As for DOS2's last act, while personally I didn't find it too bad, I know there used to be opinion that the last act feels rushed and not very well polished, and so on.
I was one of the complainers about that. It took me so long to get back to it that the DE had happened, which I think added an awful lot of polish that was needed, but at the same time I realised that there was also more content than I'd remembered: I think the problem is that I'd really hammered away at the game so much in the early stages with multiple half-done play-throughs that I'd slightly worn in out for myself.
That aside, I definitely agree with you. It's one thing if I play the game to death but it's another if I still feel I have unfinished business but the game has just stopped giving me things to do and I've scratched around looking for every last quest. I wonder if in some cases games-writers might even "top-load" games with the most inventive stuff at the beginning on the basis that a lot of people (and especially reviewers) will only play the first part before moving on! Then again, I think of my own very limited experience of writing mods where I would start off with massive amounts of enthusiasm and become really overly-ambitious, going really over-the-top at the beginning before burning out with "modding fatigue" and often not even finishing it... but then again I never claimed to be a good project manager.
Anyway, just some meandering thoughts, of varying degrees of (ir)relevance.
