It seems like a great game for those with the time and dedication to learn it.
I'm not one of those people. This game takes a lot from DOTA and will demand an extensive knowledge of the map, characters, builds, and items to start to get good at it, and I just don't care to spend the time to learn it all.
I know nobody asked, but I really wish more MOBAs like HOTS did well. I love HOTS for how approachable it was in comparison to the others. I'm at the point where if I play a moba and there's an item shop: I'm out. In every case I've seen an item shop the optimal usage of it is to build your characters stats to counter your expected build of the other team's build - and that is a LOT of added complexity I just don't want to deal with, especially because it requires so much knowledge and people with more time than you will flame you if you don't know it.