And if SC2 was 'balanced' like MvC2 was or MvC3 is looking like it will be (given that the metagame is young, I hesitate to say 'is'), then some fractional amount of a single race would be used, as everything else is too bad to be used. So, maybe only the Marine, Reaper, Banshee, and Raven are the only units in the entire game worth using. That's good game design, right? Or maybe only a unit or two from each race are usable and teching to them and microing them is the entire game.
RTS balance and fighting game balance are way the fuck different. RTS balance, or at least in SC2, RELIES on having every race be balanced (or so close to balanced as to give them all decent representation, let's not argue if SC2 is balanced yet. See: Young meta) and have multiple good builds and unit compositions and strategies within each race. As compared to MvC2 where how many characters out of the massive roster were tournament usable? Hm. Magneto, Cable, Storm, Sentinel, Psylocke, Strider (if your name is clockw0rk), Doom (mostly see previous parenthetical), CapCom, and Cyclops. And all the rest are thrown out. All the rest aren't used. And how did SC2 avoid that? By what was talked about in this article. SC2 isn't super revolutionary, I'll agree. But as a competitive game? I'd say it's outstanding. As someone who liked Brood War and likes SC2, but also sucks at micro ... I enjoy watching SC games. I watched SC1 tournies and I'm currently watching NASL. Fuck playing the multiplayer myself - I know I'll suck. That's not due to the game, that's due to that I don't care enough to get good. But I love watching the pros play.