So I bought the game on steam and played through 12 hours or so, and the first major bug that flashes like a hollowborn diamond is the movements of companions and it's clear and non-deniable there's some major path-finding issues, it really sucks the fun out of the game and doesn't bring any "nostalagic" factor if it was the case.
I can't imagine the whole game I'll be playing with companions bundled with path-finding bugs. Which implies this isn't a small one. And it should be fixed.
Proof of Concept:
Try to get your cipher/wizard/druid to get to the back line where there's a tank just behind him and he would get stuck dramatically! I mean isn't there a code that says: Hey Ai companion if you're stuck, then just use the left or the right to turn around whatever object to get to the destination.
I think in theory this should be easy for experienced developers!