[Autumn]

Even absorb veil is weaker. Even if you have the passives to halve costs and have maxed void energy, that's 60, then 30, while hurting yourself.
90 fp.

2 blue potions is 90 fp for the same momentum cost.

If you guys are so against blue potions being finite, then i'd agree its only fair to have a lot more item bag items to also be infinite.

Finite item slots was made to combat infinite usage sal volatile/hi potion/PR Hi potions, a lot of items could use infinite item slots, conversely I also mentioned in my post as well that you may need to convince people of a better solution to this issue that you are proposing, because I do believe that there is a point having such easy access to FP in a pinch could be seen as being against careful resource management amongst classes and even serve to make classes like Verglas more powerful simply on the merit of not having to need to rely on Evoker or Grand Summoner to do it's usual thing in PvE content.

Originally I was not going to post any suggestions in the thread to add to the dumpster fire spam of Balance Fu posts anyway (Over 60 posts TODAY) and just simply point out some of the issues in the original post you described. By your description you want these items to be nerfed in such a way that drives them completely out of usage, which the SL2 community has had a lot of experience with lately and is usually against, why make a very large Quality of Life battle item useless by comparison when you can do something different? Rework it in a way that would make both parties happy.

Firstly, you need to identify what the frustration with Blue Potion is, which you have already, its the seemingly infinite FP that someone can pump out in a pinch if needed be, you yourself have also expressed that this isn't an issue you have run into, its not a very common one, and even when you do its often a losing situation anyway due to the momentum issues. The inverse can be said about people relying on blue potions.

Needing to get to the point where Blue Potions have become relevant is often already a losing battle, you will not win against your opponent if you're spending 1 turn recharging FP and then 1 turn fighting until you're empty again, this is the balancing factor behind blue potion and is the reason why it's fair at the current moment despite its usage.

we have already established that simply bumping up the numbers on blue potion is not a great idea either, as you would be decreasing a lot of the momentum costs of huge bursts of FP Healing. Burst being a key word here.

What is the balancing factor behind a massive FP passive such as Absorb Power? Its that you don't get all the FP at once, you can make blue potion finite if it restores more FP, so have it restore 20 (45 with talent) FP up front, and then grant a beneficial status that bumps up your FP Regen by say...40 for 3 rounds, this would make a single blue potion roughly 4x it's value but the pay off is no longer immediate.