With enchants now usable in bgs, the gap between F2P and vet is bigger.
What classes or specs give large amounts of utility other than just heals.
Where your sole purpose is to disrupt and enable your team.
Like slows, stuns, or other cc?
Resto shaman have a ranged kick, a ranged AoE slow and (of course) heals
Frost mages have polymorph, frost nova (self), ice nova (ranged) and blizzard
So depending on the type of utility you're looking for, you have rogues for insane lock down, mages for vast AoE crowd control and resto shaman for a more versatile kit.