Both sides have good points, but, the MA is a little diffrent from the DA. Like ZaZen said, you don't even have to worry about so much ammo in the DA becasue you only fight one person. I go to the DA alot, and from experience I waste a lot of ammo, just tring to kill the other person. MA though, I try and and get a decent shot, before I take a shot. Unless I'm 1v1 with someone in the MA, I'm not looking to waste ammo in the MA, wereas, I use a lot of ammo in the DA.
This whole argument seems to be looking at "Snapshots". one side says take the shot, the other says don't take the shot. I agree with ZaZen on this one, I have never had a problem manuvering and taking the shot at the same time. You can never expect a clean shot in the DA, because he is tring to out manuver you; you are tring to out manuver him. If you get the shot, take it.