As someone who hasn't played a ton of OW since last fall (although I'm itching to get into it again this summer once my work load decreases a bit):
I'm fine with the amount of heroes added. There's no need to bloat the roster unless they have some solid ideas for unique roles.
However, I'm disappointed in that only two 6v6 maps have been added. They allegedly have more in the pipeline and I understand if they want to balance the maps + make them look awesome, but it's sort of tiring to watch and play the same maps for so long. I'd love for them to use the PTR or custom servers to play test WIP maps if that would help speed the process up, or until they've skinned them for a "proper" release.