There were limits with AI, but you have to factor in gameplay too. With 5 or 6 soldiers, if they worked together you'd be dead! No getting around it. So they have to be dumbed down to give the player a fighting chance. Similarly the crowd AI was pretty thick. If you push people around, sooner or later someone's going to take a swing at you, and then I expect a load of others would jump in and give a duffing. Then in the acrobatics, that's not entirely realistic either. A modicum of realism has to be subdued to make for an actual game!