I'd love to see an event or guild games where there are some rule chases or variations to the game.
No red heroes.
Just casters, healers and monsters.
Just warriors and tanks
Just blue, red and yellow heroes
Instead of health increases of 40% try 80%.
Try pvp with 5 heroes.
This would bring variation and freshness back to pvp.
It's just an event, 1 or 2 days, something would likely will be a homerun