I'm only 3 hours in the game, any didn't see any bug so far. Had too many things to do so couldn't play more…
Playing on normal, have a feeling it's on hard. I'm relying on melee perhaps too much. Traps can instakill a group of mobs but are hard to get (or craft), bolts seem possibly OP but are limited early game so I'm not using them a lot. Fire bolts drain your mana maybe too fast.
There is some weird behavior on mobs with shomach. Can't say it's bugged AI, they lose the balance so you can strike them easily from behind and it's probably intended. I actually like it so if it's bug, I wouldn't want it to be fixed.
So far I don't see a point of going ranger stance at all. Maybe it'll be useful later to stealth/crit a tough mob.
The first boss fight felt easier than the rest of the game (I've used burning sword). Or I just got lucky? Died once on him, dunno how exactly, and then nailed him with no problem.
There are three possible NPC sidekicks in the first village, the female mage sucks unbelievably, the elven archer is not bad at all, just got the third one who is melee fighter so can't say anything about him yet. You can have only one sidekick in your party.
While some can say there is too much of walk, it's far from annoying, sprint is not staminabased so you can run very fast as long as you want.
Didn't craft many things so far to say if it's made awsome or not.
And most important, I'm unsure if the game is endless respawns grinder or not. When you clear an area some new mobs do spawn on your way back but just once and are different from previous ones. And this is not like in jRPG where revisiting an area means repopulate, this happens without area transition when you receive a new quest.
I need to play some more to be certain.