For the game itself: Without wanting to spoil, one must unfortunately say that the leaked end ... really was the end. Up to the last few seconds at least. The emissions are overall just too easy. Where you at Wings of Liberty Brutal already on 20-30 attempts needed for a mission you're in Heart of the Swarm truly advised to play the game from the outset at least difficult.
For some, it may easily be fun but for regular gamblers was easy or normal snoring boring.
The story itself is actually okay but you will as soon pelted with so many characters that you barely have time to engage in them and they are simply there at the end.
The upgrade missions could have been really skipped 2.- play-through, that was downright annoying.
The idea to develop the flock into two different branches sounded good at first ... but overall it came in front of a much too little. You could laugh at Wings of Liberty still and have fun over conversation, so there is in Heart of the Swarm truly a dull blissful mood.
What does not have to be bad, because the story is not just get cheerful and happy and Zerg something like humor are known not used to.
Overall .. a longtime fan of the story and Starcraft series I loved pretty disappointed and not particularly at the end. The game left a strange aftertaste of hard to describe.
On the multiplayer, I'm not one, because this was not half as much at heart as the story itself.