Also, in terms of group make up for bosses and such, it's best to be able to have some flexibility in your raid groups.
I think you say this, just because it's the nice thing to say about a raid or a game. I've seen this issue in another MMO(and im sure it happens in dozens). Make casters too weak and they feel like buff bots. . .make them too strong and you have all caster raids/epics.
But having that ability to range everything needs to be taken into account.
I kinda agree with the more DPS part, but give us a debuff when in PvP(like they do with healing) to make things balanced.