It's a bit on the late side to be thinking about rewrites to improve later acts don't you think? Given the game has already been fully released for a while (And unlike some other titles, it was successful so no need to redesign anything)
It's a pretty common complaint that Act 3 is lacking the polish and depth of the previous acts. I've seen this widely echoed in every BG3 fan space I've been to. You have fewer options in the way you resolve quests and you can't play with factions to the same depth you could in the first acts, especially Act 1. Companions have low reactivity to quests/conversations/the environment and a noticeable lack of banter compared to previous acts, there's way fewer camp scenes, plus there's some obvious cut/rushed content that could've been added back in (I think Gortash's alliance originally had a much broader scope, but one example that's obvious from the finished product is the Szarr Palace, where there's letters from Cazador's vampire niece that he kept in the attic, plans from several spawn to escape Cazador's control, and a confusing speak-with-dead that was later removed, but none of this is acknowledged by anyone or followed through on.)
It's much buggier, too; even in the most recent patch, Mother Superior is refusing to realize I defeated her and warping back to her opening dialogue, and Wyll and everyone talking about him are extremely confused about which ending he actually
got (in addition to Wyll responding to picking up Balduran's helm 3 times in a row.) Also, several characters give me dialogue implying I'm an origin character, or a different origin character than I was playing.
Act 1 is the holy grail of all gaming experiences, Act 2 is very thematically tight and polished even if it's not quite as content-rich, and Act 3 doesn't feel quite finished. It was something I was hoping a definitive edition would fix, and I'm not so hopeful for that now. I can live without DLC, but leaving the climax of the game the way it is, give or take some bugfixes, makes me sad.
