Can't comment on ACT 3, but ACT 1 and 2 have been pretty stellar in terms of performance. Way smoother than before.
The rubberbanding/lag/delay I've definitely seen and it seems to be tied to the way the game is loading in assets, particularly the NPCs. I've managed to reproduce this easily in ACT 1 and even ACT 2 on purpose. And there are even cases where it does happen all on its own. Like entering Moonrise Towers for the first time, or exiting the rotted cavern leading straight into the zombified Kuo+toa ambush. The amount of stuff it loads in creates the delay in any action and I've been waiting there for 20 seconds before I got control back.
I'm pretty sure Larian is aware and already working on it though, since it's a side-effect of their improvements to the asset streaming in the game. It definitely is a ton smoother than it used to be, but naturally it now introduced this lag/delay bug.
