Usually I don't say, "Hey, that guy has AL, i'm going to make sure not to run him over because if I do i'll die," Usually when I see an enemy randomly walking in the battlefield I run them over in the heat of the moment because by the time I see their name, it's to late. Also, I honestly hate aa, I know everyone gets them so it's "fair" but honestly I feel as though equipment was much more balanced. I was never able to play Halo CE online so I'm not necessarily sure how it played in multiplayer but i'm sure it was more fun than reach.