I disagree, if Blizzard was willing to they could balance classes every week by tweaking passives a percent up or down here and there to make all DPS specs perform within a 5% margin.
It becomes a problem the higher you go on the rankings so unless you're happy with raiding in that world 2-3000 guild then it's going to affect us negatively. Which is why I'm for Blizzard doing the balancing above.
I don't care about interesting use if we're under performing, I care about being able to be competitive in terms of DPS.