Thanks Matt, I agree that more specific heroes would be quite useful.
Mulan is a nice hero, just need to find the right place for her and she'd be awesome.
With the idea of special holiday heroes, I was also thinking Tynon might be able to offer them in holiday packs (along with all the other awesome stuff they offer us on holidays).
Other new content in the game would be nice (but we know it takes time for Tynon to work on these things, so not too much pressure here).