I think it would be cool for something more unique, for example...
Maybe a mix of hon/dota with a mmo I think would be amazing. It would require alot of tweaking, but here is my idea, and I think it would be so much fun...
If you haven't played dota or hon you might be kind of lost here....
Have "arena" style set teams of 5-10. Each team starts with a instanced fortress at a basic level. U challenge other teams of similiar rating and enter a fight vs each others "fortresses" similiar to hon or dota, u have constant npc's advancing towards each others fortresses. The more you win, Instead of buying items to upgrade your avatar like in dota or hon. You cam buy upgrades to your npc troops, or towers, or buildings ect. when you lose, your rating goes down, and you have to purchase items from winning or losing to repair your damaged towers ect. So you will fight other teams with damaged buildings to try and push yourself back up...

Idk, just an idea, but I thought it would be so much fun to mix one of the best pvp games ever created with an mmo.