Both of the current maps have great components. However, they are both symmetrical, which somewhat limits the dynamic potential of a fight.

I think something like a half pit, half ring map would be cool. A cliff map. One side of the map would have a wall that prevents ring out, while the other side is open and allows for ring out. This would force players to fight for position much more aggressively. For balance, the cliff side could perhaps have some nooks you could get cornered in if you are not careful. Asymmetry in map design can lead to more thrilling fights.