I'm taking my time in Act 2...hoping that a patch comes out that will address the end game shortcomings. As I get closer and closer to Act 3, if it hasn't been released, I may put the game down and wait. All this being said, it will be hard to pick up a game like this again after letting it sit for too long, so I'd probably have to start over. But I don't guess that's too bad of an option. I've noticed a few bugs in Act 1/2, had a few crashes, but the experience overall has been great. I'd hate for that vibe to get messed up by a terrible ending. So if I have to start over months from now, it'll still be good.
Definitive Edition for that horrid DOS2 original abrupt ending came like over a year later, so don't hold your breath. You'll be waiting a while. Just have your journey and take it for what it is, then enjoy the fixes and expansions on a different playthrough when they release a definitive edition.