Remilia, on the other hand, sounds quite damn improved. Do you think this might make a "half SDM" team (like Remilia, Flandre, and Meiling) viable?
Meiling is already a monster by herself, and Flandre is worthy solo as well, so if Remi's been buffed into higher usefulness, then... there you go! It's unfortunate about Private Square, but I imagine Sakuya is viable too when you're already using three people. Killing Doll scales better in a postgame where def/mnd no longer rule everything, and Akyuu could help enable her awakening attack boost. Although I'd still rank Patchouli as a "maybe..." even when using all the other members... First Aid Kit or Tokugawa Statue and all the HP boosts at least get her to something workable I guess?? And her low def becomes less catastrophically low, along with less important in general.
With how endgame works, I think Byakuren, while not a half-bad choice in general, is mainly only the ideal choice if you're using the characters who piggyback on her like Shou, and Nazrin- who becomes viable with her awakening, even if you still moreso pick her for grinding assist than bosses. Grind is a good portion of endgame, after all, so that's actually pretty relevant for a party slot.
Gotta woooork, but can't wait to check the new patch out soon! A truly infinite corridor (not even just 999f looping), and infinite Winner... well, addicts like me will certainly be able to overplay the game :V