With 1.0 out to donors, I'm replaying the whole thing from start to finish, with a fresh save. Will start on Easy and do a Hard Mode playthrough later. I just finished Dungeon 2, but I noticed a major UI bug in need of attention: in the settings menu, the Casual/Hard toggle is visible on top of all the settings, overlapping everything. It blocks the view of everything else and doesn't seem to be removable, which makes it very hard to change settings.
EDIT: this only applies after starting a new game. When loading an existing file, the toggle screen is no longer present in settings.
A more minor bug; if you somehow manage to aggro two groups of enemies at once (easy to do in the first fight of Dungeon 2, if timed correctly), you only fight one of them, but defeat both.
Balance-wise, in Dungeon 1, the shame effects seemed to randomly stop partway through? Characters who got stripped early got their Shamelessness up to a medium-high level and then just... didn't seem to get any more Shame or Shamelessness, and didn't qualify for half the titles. Notably, Sayaka shot straight up to 93 Shamelessness and just stopped; she didn't even qualify for Deep Shame, and I'm not sure if she ever had more than 30 Shame. I don't remember this happening the first time I played it, so some rebalancing since then seems to have broken the dungeon? I get that the post-boss items were intended to help fix this, and it was indeed possible to start gaining Shame again after removing Shamelessness, but I just wound up cheating in the appropriate stats afterwards, since the grind started to feel tedious way before I was anywhere near done with getting titles.
In Dungeon 2, the enemy AI is unusually good at focusing fire on your girls, taking them out rather quickly and forcing a retreat. Given the lack of revive items, this made for a lot of tedious restarts. Being able to revive even one girl would've made a big difference here; it's a very frustrating feeling to have a stack of unused healing items, three girls on full HP, and one girl at zero, and needing to go back again. This was such an issue, I never actually made it across the room without someone fainting until I'd hit the level cap and gotten the party mostly skilled up.
EDIT: In contrast, Dungeon 3 was far too easy. I was able to open all the boxes and defeat the boss without losing a single girl. It took notably longer to grind up enough cursed jewelry to get everyone fully outfitted, of course. The Nose Ring and Clit Piercing did serious work in keeping Sayaka and Kyouko held back, requiring some extra grinding to get them up to cap, but it wasn't nearly as annoying as the focus fire in Dungeon 2.