Terrans will complain regardless.
I mean, do you remember when people though of the muta "magic box"? Terran players were whining all over the forums "OMG, I NEED MORE THAN 1 THOR TO BEAT 20 MUTAS NOW! IMBA! FIX!"
BUT THEY ARE IMBA!
There's a map knocking around that gives you access to the HotS units. They use the wrong models, the animations are broken, there's probably a few balance changes not in there and likely doesn't have the right tech tree, but it gives you an idea of what the units will be like. I've found that leaving a Swarm Host near expansions (both yours and ones your opponents might take) is rather annoying: forces a little retreat when they attack your expansions if they don't have detectors giving you time to come down with some units and if your opponent isn't watching, it can cost them an expansion.
EDIT: Put Lurker instead of Swarm Host, silly me.
