I think your head is in the right place, and maybe once upon a time that may have been the intent of the developers, but I just don't think that is the way the meta evolved.
Thr problem is, even if Druids/Paladins/Shamans brings nice buffs/utility to a group, having another DPS that can kill stuff faster will always be better. There is no need for utility if everything is dead. That's why you always want to enhance your strengths rather than sheer up your weaknesses.
i think if this was the original intent of the developers than what they should have done was given the hybrid classes the best CC. That would have made their utility much more necessary. But as you would have it, the best CC actually belongs to Mage/Rogue.
