Great Train Robbery with Banshees is such a cakewalk it isn't even funny.
Well, that is leaving this mission very late. Generally speaking any mission you leave late like that is trivialized just because you have way more advanced units than it was designed for.
How can Blizzard expect to sell Heart of the Swarm first expansion when the star faction is broken to the point of being unfun?
I think they're probably just waking up to this one right now. I'm several standard deviations above the "average" gamer, and I can barely handle Zerg, and even then it took me several weeks longer than it took to get comfortable with the other factions. The easiest improvement they could make is putting the Queen's larva generating ability on autocast. It's a trivial "spam as soon as you can" ability, which is really a poster-boy for abilities that should have autocast available.
Funny how you say that zerg are broken, yet a zerg just won the huge GSL tournament in South Korea
Broken doesn't just refer to balance, it can also refer to gameplay and mechanics. For a 500 APM pro-leaguer, zerg is perfectly playable. For a 60 APM average gamer, Zerg is completely unplayable currently. As I said, I'm well above average and I still have trouble with them.
The fact is if we're talking about the experiences of an average gamer, the experiences of a pro-league tournament are utterly irrelevant.
It's a good game, but COH still trumps for RTS of all time.
Personally I'd say WC3 is my pick for "best RTS of all time", but SC2 doesn't even make my top 5 in its current state. Blizzard has a good track record of post-release support, so it could pull ahead of the pack, but it's got a lot of ground to make up.