That's it? That is it??
HotS is a great deal shorter and less interesting than Wings of Liberty. No more Protoss side missions. The story is devoid of any surprise and the characters are completely forgettable. The game is also a good deal easier, with a bunch of totally superfluous "evolution missions" which serve to demonstrate evolved variants of the familiar units; tiny levels where you practically can't lose.
The gameplay feels as smooth as ever. As we've come to expect from Blizzard, they seem to have spent a lot of time again testing the game. Great, but it's polish of a mediocre game. First Diablo 3, now this. Blizzard seems to be losing its way.