I agree. If you don't feel like there's any danger of being shot at in a shooter, then it's just a matter of pressing buttons to advance the storyline, but then you lose that feeling of achievement for "getting there" at certain points of the plot. The enemy that Mike lobbed a grenade at didn't even attempt to make an escape, although I think it was a bug, because somewhere in the video enemies can be seen somersaulting, which I assume can be done to escape grenades as well. But back to the weak AI, a game that emphasizes the plot should give you the feeling that you had to work to get where you are in the story, in my opinion, and judging from this footage there is definitely room for improvement. Then again, we haven't seen very much of the game.
As for the reload animation, I'm sure they're still being worked on, seeing that much of the game's polish hasn't been applied yet.