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Can confirm, 3 post game dungeons were in full release, adding new states. No proper recollection room though. Clearing all the redo dungeons unlocks clothing damage though.
One of the releases had a zip file of the dev's saves (I've attached it to this post), and some of those saves are in the debug room. There appears to be a recollection room, but it doesn't seem to function correctly when accessed "normally"; there is a save in an apparently-functional version of the recollection room, but the player is lodged in an obstacle and cannot move around to examine things. Maybe someone else can figure out if there's a way to view it properly.
As for that maze, the dev has actually tweeted out
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New Postgame Dungeon 1: Cyberspace
Theme is being digitized into a woman-shaped data file. The victim turns translucent green with faint wireframe lines visible, posed and smiling blankly. The boss-loss bad end also has the party reprogrammed to join the cyber monsters in digitizing subsequent intruders
New Postgame Dungeon 2: Witch's Swamp
Theme is adjacent to the cultivation-tank fetish... the victim is shrunk to palm-sized, dropped into a bottle, and left floating in a life-support drug that also keeps them in a mindless daze. The boss-loss bad end has some recurring NPCs attempt a rescue but fall victim themselves (offscreen, unfortunately)
New Postgame Dungeon 3: Museum Maze
There are four themes here.
1) In combat, enemies can turn party members into life-sized figurines but with just their clothes turned to glass
When your active party enters the maze, all reserve members are promptly hypnotized into offering themselves up to become museum exhibits
2) The maze will be populated with enemy versions of the reserve members, embedded in large stone tarot cards (all inverted, only Valna as the Devil and the final boss as the Fool are upright), with just their head and torso sticking out the front, with glazed eyes and sinister smiles. They attack with versions of their original movesets.
3) These tarot card monsters are replicas apparently produced by magic mirrors placed around the dungeon, housing the victims' still-hypnotized souls-- smiling vacantly and lifting their skirts or opening their tops or other mildly-lewd poses
4) The reserve members' vacant bodies have been turned to life-sized figurines wearing casino bunny costumes (shiny but
not glass). The soul mirrors can be collected and reunited with the bodies to awaken them and return them to the party
This stage's boss-loss bad end is a playable epilogue of a gallery exhibit featuring all ten members subjected to all four of these at once. With the glass-clothes figurine versions existing at the same time as the casino-bunny figurine versions somehow.
