As a warlock, I'd give up DPS to have more utility. I want group debuffs, stuns, and what have yous. I want more nukes that do comparable damage but with different secondary effects. I want to be able to change my casting decisions based on a mob's type, life remaining, and encounter make-up. I don't want to cast the same 4 nukes and 2 debuffs over and over with a stun thrown in there every minute or so.