Well, for "normal" enemies that varies quite a bit. By normal I presume you mean non-boss. But in that sense, there's still a lot of kinds of enemies, such as those that swarm you, those that are simple and for newbies, those that are rarer and tougher and smarter, etc. You should see a pretty good variance, but bear in mind that when the number of abilities an enemy can use is limited, the options for making them amazingly smart-seeming are pretty limited, too. Aside from bosses, you won't see many multi-ability enemies until a couple of dozen levels into the game for the most part.
For me, AI in a platformer can only be so good. My goal isn't to make stellar AI here, because I feel like there's only so much that you can do with that. Rather, what my goal is is to make varied and interesting AI, especially with the bosses, and I think that's definitely attainable with the new AI behavior system that the game now runs on.