Apologies for the wall. Anyway, on almost every large scale map players have a base that they spawn at or in. I am proposing an interface with that base. 1 of the ideas would be an ammo station for the Warthog. In MM the warthog turret should run out of ammo after a reasonable ammount of time (say a full 2min 30sec on full auto fire). Returning it to base for a certain ammount of time would allow it to restock on ammo. If you were on the recieving end, it allows you and your team to regroup.
Annother idea for the interface could be a map wide motion sensor. This could allow you to see the location of any friendly or enemy player fireing on the map. Annother possibility could include base traps. This would keep the enemy from camping in your base and causing you to spawn outside making you and your team an easy target. After a certain ammount of time in an enemy base, its defense system kicks in firing an auto-turret of some type. These are just some ideas I had for Reach. Let me know what you think and sorry for the wall :)
[Edited on 07.16.2009 7:37 AM PDT]