Flavor of the month much? With that attitude you'll have 11 chars all with incredibly shitty gear, and you'll be a hopelessly bad player at all of them. You'll know a lot about different classes and specs, though, but that's about the only positive about it.
I played one single underpowered spec in vanilla, and kept playing it through several expansions and innumerable patches, and only felt screwed over once or twice. Your argument is invalid.