Hmm bought the first day it was released, the only problem I had was about 3 weeks ago when it would crash in Port Llast and I lost all my saves and had to start over again. I am am not referring to getting the rules right, which I could care less about.
The first patch didn't come day one and you may have skipped it. Further, you may have simply not met the conditions that applied to causing the problem to appear. As an example, when trying to get the Lizards as allies, the NPC lizard who would rush in and initiate a dialogue after the fight with Batha would die during the fight (meaning he couldn't initiate dialogue afterwards and thus, the game would not progress, and you'd be stuck in that little area) if you had a difficulty setting where PvP rules came into play. Because Batha might accidentally kill him. Then again, if you're lucky, he might not.
Another of the time occurs only if you took the thieves line earlier in the game and it's to clean up Moire during the same act as getting allies. To get access to her hideout you had to deal with some henchman. For some reason, I can't recall the specifics, the guy who was supposed to activate the script enabling you to access the hideout would not activate as he should. I don't remember if he died too early or if combat somehow prevented him initiating dialogue or what. I don't remember what the specific deal was there.
There were other things like this, I don't remember what they all were. They largely depend on you meeting some conditions and only seemed to occur if you installed the first patch with the Druid stuff that came out several days after launch. And likely were fixed with the patch following it.