I went round the map and compiled a list of what I believe are (fixable, at least) mapping oddities from the new maps added in the D2 update. There'll be multiple, and I'll group them together by location in this post.

Sanctuary of Lost Minds



In this particular screenshot, bottom left of the main body of the dungeon, the walls at the top come down four, curving on the fourth. The bottom one comes down four, but doesn't curve down on the fourth, making it look like a taller wall than the rest.



In this area, the battle room outlined by the purple torches, a similar issue is happening. Walls come down two, but by the edge it fails to curve on the second like the others are.



In the jail room with the important looking shards, you can see this happen again - but much more noticably, as instead of continuing the turn off, the wall goes UNDER the corner of the roof instead, being four blocks tall instead of three.

Yokoshura



This bridge, bottom left of the map.

1. You can access the below-ground warp from atop the bridge by simply walking into the rope. There's nothing to prevent you from doing this.
2. The terrain curves into the bridge. It doesn't need to, and realistically wouldn't do so.

Point 2 I'm pretty sure is happening for all bridges in Yokoshura specifically, though.



Inside this here cave in that same area of Yokoshura, it appears the hills are using incorrect stairs? I don't know for sure, it just looks really out of place on the left side specifically.



Under the two floor lamps in this building, the path doesn't actually ease into the sand. They're just solid middle block, rather than left and right edges respectively.



The dam structure.

1. The edge just north of the stairs doesn't continue under the ruins wall, it just ends a tile before.
2. Specifically only on these diagonal parts here, you can see the decorative trim is missing corners.



Just right of the dam, there's a bit of wall trying to curve up there, but not continuing all the way down.



Just to the right of the cave that would lead out of Yokoshura, there are some oddities on the corner pieces of this dry ground roof, as if it's trying to connect to other things.

Oskard-Sothis



In one of the big multiple exit caves, here to the right, the orange roof tries to curve but the orange wall doesn't curve with it.



Also happens here on the right in that very same cave.

Land of Waterfalls



The dirt cliff edges here are dense. You can't actually walk on them.

Alterated Jammer Cavern



Just to the right of the crystal terminal, the roof of this wall is missing a corner where it sticks out.



Happening on both the top and bottom part of this image, where the floor meets the wall the cliff doesn't actually go far enough to curve into the wall, leaving parts underneath that don't have an edge.



Right at the back of the dungeon, the waterfalls here don't actually connect to each other. They're all individual bottom pieces.



In this image:

1. The waterline for topmost cliff doesn't continue under the wall. It just abruptly ends.
2. The edges of the floor under the water don't connect into the wall, they just inexplicably curve without ever connecting to it.
3. It appears that the second curve from the left under the water uses a middle piece for the bottom part of the curved wall instead of a curved left piece.



Just outside the boss arena:

1. The normal floor doesn't curve with the wall.
2. The floor under the water doesn't connect to the wall properly, it doesn't go under it.



Here in the top right, you see the walls coming down three, curving on the third. Except where this one part connects to another roof and doesn't curve on the third, instead continuing straight down erroneously.



The battle area.

1. The walls that connect to the ground don't actually use bases, just middles the whole way down.
2. The waterfalls are missing bottom corners, using middles instead.



In the water just south of the battlefield it tries to curve left on the right side instead of matching the other tiles.



Here, the floor edge under the water is missing a tile just when it gets to the roof. Look left on the row from the person in the screenshot.

Weald



In the top left of the cave you access through dropping down holes, these stairs up to the exit have a tree root on the right side. Said tree root seems to be cut off, missing the bottom of itself.





In the far left of the exterior map, right on the border with Duyuei, there's a consistent set of missing tree under the treeline on the left side of the tree formations.

This is probably not all, but it's most of what I could find. If anyone else finds more, let us know!

Great tortoise (skill on Genbu) seems to either have the wrong skill icon (The sync mind skill icon, instead of the install icon), or not be usable when not installed unintentionally.

we live in a world now where most classes have been "crunched" or will be soon enough

in this world we can't hold all our skills, or even a good two thirds of them anymore


I suggest a simple +10  skill slots to the base amount that everyone has.

Music sheet material is using your bare fists as a casting tool for all bard things, not the weapon itself.

Edit: Music Sheet material also doesn't seem to be making it count as an instrument for passives like the Harp Plucker's Glove's +5 hit to instruments, Dark Bard's Bard's Dexterity, etc. Might be intentional though!

Gear Mastery from Shinobi doesn't increase damage for Hisen's Fatal Stroke.

Ingrain
10 FP/1M
Target: Self
Area: Single

Dig your roots into the ground, gaining Immobilize for 10 rounds while becoming immune to knockback and pull effects. If the user is Vampiric Legume, Grant one stack of rooted and spawn a 2 wide circle of root tiles (LV1, 2 duration). 

Additionally, if the user is Vampiric Legume, the cost to ingrain once more costs three momentum, as it takes significant effort to uproot. Rooted tiles made by this unit are retracted. Enemies standing on rooted tiles are knocked down with the retraction if legumes rooted status is level 3. Rooted is removed after using ingrain again



Synthesis
Passive
Target: N/A

At the start of a new round, if the owner is immobilized by the status or by any movement denying skill (Firing posture, tyrants throne, unmoving, etc), all enemies within 3 range are drained for half of the owner's LV in hp. The owner of the skill is then healed for that total amount of hp.

If the owner is Vampiric Legume instead. They gain rooted (LV1, 2 duration, max LV3), which creates rooted tiles around them in a self centred circle equal to 1+LV range around them.

Demon Plant
Passive
Target: N/A

A plant capable of growing in the soil of Hell itself. Grants 25% Dark Resistance, but also gives a 25% Light Weakness. In addition, 10% of the damage dealt by the owner of this skill is returned to them as HP.

Rooted
Status

Creates a circle of root tiles around the owner (owner LV/2) equal to rooted's level + 1.
   

Root Tiles
Tile (plant)

Deal dark damage equal to lvl to enemies standing on them on new round, healing the owner of the tiles the amount of damage dealt before pulling the enemy one tile closer to the owner.
   

Nacht is rad. Easily my new favourite yokai.

Nacht is also a goddamn nightmare to use as a Shapeshifter.

I'd like to suggest a second Invoke to the effect of something like Scroll: Raven or maybe even Splash. Something small to get her installed because you can't use her Invoke on yourself.

Alternatively that you be able to use her shell on yourself at a lessened effect or something.

Shadow Clones do not save sprite offsets/resizing.

False Target can still activate even when the Shinobi is under the effects of Clumsy.  This was tested on the test server.  To replicate:

1.  Equip False Target on one character, and fight them with a second character that has a source of clumsy equipped (board shaker, Wyverntouched trait bite, etc)
2.  Inflict clumsy on the Shinobi, swing over and over until False Target activates.