Way to ruin gameplay in any game = add powerups.
Seriously, whenever a game has those, the strategy turns into ...rush rush rush to powerups, get them = pwn all, fail to get them = die repeatedly. Then sit there camping the powerup spawn. I got so tired of it UT. We'd be doing CTF battles and people would be only concerned with camping the powerups. Was like, guys...flag? Cap? Nope, just killing each other over a stupid damage amp while the team cries for support fire.