Just some ideas that I came to. They should have a new PvP addition where you can only queue up with a certain amount of people, could be anywhere from 3-5 (Thus making it fair, even teams). The PvP rules would be Team FFA.
Now here is where its different.
Create a map. Straight line map with about five bases. Each team has 2 bases. The middle base will be neutral. The objective is to capture the enemies main base, or at the end of the time limit have the bases controlled. Now this map could include, different routes to bases. But to take these routes you have to pass deadly NPC's. So its a chancy move. Barrels and other objectives should be included.

That's what I have so far, any suggestions or opinions?