The problem with the ammo meter is that it rewards you for way too many things. Get a kill get progress. Fair Play objective get progress. Understandable Get an assist get progress. Wait Die get progess. What? They'll never be able to properly track it, but also the people who shotgun melee. Sure they wasted a shot because it didn't kill you, but the melee follow up did. Now they get rewarded for the "ability kill". I get they want to avoid snowballing by rewarding deaths, but there is no reason i should kill someone who just blew through his specual ammo only for them to come back two lives later and do it again.