Easier said then done.
I've got plenty of Big Team maps in my fileshare.
The problem is that mostly party games or slayer is played.
I'm sick of those.
And when we do have a larve party, its always lopsided thus preventing any objective games from being played. By 'lopsided' I mean that the teams are always unbalanced either by numbers or skill.

To make matters worse, Forgers seem to always go for their map's power weapons/vehicles at the start of a game. How about letting others learn your map and weapon placements before you start unbalancing the game, people?
I've been guilty of it myself so I understand the temptation of getting the first kill and owning everyone from the start. But that's not a proper play test for new maps. That's why I've stopped doing it.