Unfortunately there are disparities like this. Playing any other spec as a wizard and watching a WD with Dan's DPS let alone mine or a Barb who's DPS skill buffs are MUCH more effective makes us cry because our skills suck except for CM/WW and are just not viable unless you massively outgear content.
So doesnt that show why blizzard needs to nerf the OP abilities, and buff the other ones?
My example of me doign MP7 uber ghom solo and hitting enrage is a good example. If i swapped to bears, i doubt that i would have problems. However I dont have a LS weapon, so I cant really do so at this point.
The point however is bears > essentially everything.
I would FAR rather see bear damage reduced and other stuff buffed, OR other stuff simply brought in line with bears (assuming bears are the standard).
Same goes for CM Wiz. If CM is the standard, give buffs to other specs so that they can compete. (IMO perma stunning is still not fair and probably wasnt intended).
I am sure many Wizards would cry if CM was nerfed. But if other specs got buffed, would they still care? (probably because perma stun is OP!)