Recent Blizzard forums complaints have pointed towards the debate over when exactly a patch is going to occur that addresses a much needed (so players say) balance change. While Blizzard has been in the dark about this for a lengthy period of time after release, Community Manager Bashiok (most famous as the Diablo 3 representative with an iron fist) opted to step in to clear the mess. Here's what Bashiok had to say in regards the unlikely event that a patch wont be released until the next expansion:
"(Hopefully this doesn't read too harsh, it's been a tough Monday. ;) <3 <3 <3)
Our intent is not to have a game with broken balance in an attempt to sell an expansion. That should go without saying. It makes me sad it isn't.
Our intent is also to not apply knee jerk fixes based on the first few weeks as understanding of the game and strategies are still in flux. The game is young, and we don't feel that it would have been helpful to progressing peoples understanding by throwing in tons of fixes based on flavor-of-the-week (or day, or hour) strats.
We see a lot of variation between the regions. Making a change for how NA players play may be completely ridiculous for how KR players play, and actually mess up a balance there. For instance 10 of their top 20 players are zerg. So that's one place where we have to be mindful and careful and attack balance issues with great prejudice.
That said. There are balance changes coming. What everyone was seeing in beta with tons of quick balance changes are because it was in beta and we feel we can get away with throwing out a lot of 'we think this may help' type fixes. With a live environment we're not going to throw stuff out there unless we're pretty sure. We've played. We've looked at data. We've looked at each region. And then we act. Which isn't to say we may not be wrong from time to time, but it's a more measured approach than beta players may be used to or expecting."
Not too surprising. Going by the general attitude in the Void Ray Massing thread, the best solution seems to be "add New/old units to balance things out for Protoss and Zerg". Blizzard likes to save adding new units for expansions, so it makes sense they'd be holding off the big balance patch until Heart of the Swarm.
That said, there's no technical reason for them not to patch in new units (they added in new neutral heroes for WC3: TFT), but I can understand why they'd choose not to. Gotta save something for the multiplayer side of things in HoS.