I'd love to see a big game with many different objectives mixed into the combat. Each team has objective going while still maintaining presence on the field. At the end of the day, the team with the most objectives completed wins.
If elimination is the determining factor, you will have problems with hit calling. If objectives are the determining factor, it would discourage dishonest play.
I think many objectives on top of regular play would intensify play, without having to increase ref/admin presence too much.
Rhino did this, but in a first gen kind of way: 'hold this building for the next 4 hrs" vs something like "find the briefcase in this building in the next 30mins" "the enemy have taken an informant with sensitive info, recover him in the next hour"
Calculating objectives completed and buildings held/duration would determine the winners.
This is coming from someone who hasn't even hosted a game, so the logistics of which may be impossible. I'm just typing what I think would be good.