I’m also curious, is there a hero battle game mode? That’s where I logged most of my hero play time anyway. If it takes me forever to get them as an upgrade in a usual match, I could probably live with that, but if it takes me forever to just mess around with them against other heroes, that’s a big problem for me.
There is a hero battle mode but you can only play with the heroes you’ve unlocked. If you haven’t unlocked any heroes you get automatically booted out of it.