I remember seeing the goatmen again in Diablo 2 and they didn't do any of that. Melee goatmen would just run straight to the player, and the goatmen archers were not in the game. Usually in D2 every mob would just run straight to the player without any strategy. Anyway, point is, it would be interesting to see mob AI have those types of reactions to the player again in D3, especially for the harder difficulty levels. If it's already like this, then great!
Also I'm aware of the events in the dungeons and stuff that require strategy is great, but the more advanced mobs (not all of them) using AI tactics would be sweet as well.