I've gotta say, I'm pretty disappointed in SC2 in terms of game design. I don't mean multiplayer and balance or any of that, but I think Blizzard has gone overboard in trying to make the game run accessible as possible.
It's still DX9, which is ancient, does not scale to multiple monitors (to keep competition fair, fine, make it an option in game or in tournaments), has no crossfire/SLI support and doesn't take advantage of quad core CPUs (I can't even think of a good reason for this when the game runs fine on dual cores and single GPUs), and no LAN (anti-piracy, sure, but seriously, having to connect to Bnet, which may not be possible all the time, just to play with my friends sitting next to me, is very annoying to say the least).
Blizzard has tried to make SC2 as fair for multiplayer as possible and as forgiving on hardware as it can be, but I think they have taken it too far in their zeal. While I agree that the most important part of a strategy game is gameplay and not special effects, the game engine and graphics is already outdated before the game is released, and Blizzard's decision to not support current and future hardware (Quad core, Multi-GPU) is backward to say the least and is hardly the way to establish SC2 as a worthy successor to the original legend.
