Thats cool, I went negative 8
Great idea, but is it ok that i may add something...
How about that in addition to the pelican dropping vehicles in dire situations you could also buy replacement armor abilities. For example you spawn and drop down, everyone has the starting armor ability of sprint. So you are doing well in the game your on a killing frenzy but have a very small amount of heath left, being shot at, and taking cover behind a rock. What do you do? You press a button on the controller allowing you to trade in sprint for a medic bubble(For the points you have earned of course). Now you are safely in the bubble, reloading, and healing your shield allowing you to take on the incoming enemy.
The gametype idea is fantastic, I may ad and with some small investments on bungies part i believe this could be a reality.(This is Bungie's last halo game, so they should include as much as possible) ;)