I was thinking we could have MFBs as the capture points in the Terrain Control game type. That way, there'd be a significant value in holding that terrain point, beyond just tickets.
It'd be great to have a purchasable MFB vehicle in the game, too. You'd drive it to a location and deploy it, and also be able to defend it (a little) via a turret you could man while it's deployed. You'd earn Cbills for both the repairs you effect to team vehicles, and also, any destruction you did by the turret.
I'd certainly be prepared to drive support vehicles for the team every now and then, just as I do AA/BA duty from time to time.