It's hard for them to balance some of these characters, because a primary focus of theirs will always be making the game (and ALL characters, to some extent) accessible to new players. This will always result in certain heroes having abilities which are useful in the hands of a novice and overpowered in the hands of an expert.

Still I think they do a great job overall with the balance of the game, and I look forward to any future updates aimed at improving this. Good post!