Balance of classes has been and always will be an MMO issue. The people that play the stronger classes scream and yell at everyone because they like being at the top. Those below them scream and yell because they don't get picked for the groups. Everyone wants to be the hero, no one wants to be left behind.

I'm not the biggest fan of "nerfing" and prefer to see them add utility or buff classes that are lacking. Issue with that is, if you buff classes to much it forces mechanics into raid bosses that just are not fun. While it sucks, nerfs tend to be the better choice.