This is why I dislike SC2, you need to actually put time into learning the game. Not just playing, you need to watch replays, commentaries, read online to the point where playing SC2 is a huge time sink.

It's not worth playing MP that need so much time poured in it. It's not like you can play other games at same time because you need all the time you can get to learn one game.

Is it worth it? Not for me because there are other great games out there to enjoy and SC2 is not the only game out there. 

I probably won't buy HoS as the MP would still be the same time consuming deep MP.