PVP upgrade?

Hello Crate,
I love this game. However, i have a few recommendations for pvp. I was wondering if it would be possible to balance pvp a bit. As it stands certains builds simply dominate. And some more features such as the ability to wager before a fight. Or the ability to have 2 different groups so 2 v 2 is possible would increase the use of this multiplayer feature. Also perhaps no creep spawns on the map. :p. What do you fellow grim dawners think?