[Ranylyn]

I've had entire 7+ floor BDPs be nothing but corridors that make the sample in post 1 look generously spacious. Due to limited Line of Sight and moving monsters, it's a nightmare of a core floor - and now with full clear bonuses being a thing, these nightmare mazes can make it super easy to miss a single enemy on the way if you're going for that clear bonus, making you take even longer just scanning every nook and cranny.

Also, in regards to the types of dungeons it happens in, it does happen in Tunnels and Caverns as well.

Long story short, the first few times aren't so bad, but after playing for a bit, it gets old fast, and it gets so bad that I've had parties parties who elected to just quit for the day instead of letting someone else lead so the leader could take a break from the madness,