From TXB:
So health is really gone... That bothers me quite a bit, to be honest.-You have an option to turn active camo on or off so power ups are back
-Quickmatch and optimatch games will change your stats but party-based games will not.
-The guass cannon is confirmed in the OXM and in multiplayer
-The scoripian's movement and turret turning speed are both toned down
-In the Banshee, pressing left on the thumbstick and A simultaneously executes a barrel roll (similar to Crimson Skies)and right and A makes the banshee do a backflip, etc.
-The FRG isn't gone, it was assigned to the B button.(Banshee)
-The beam rifle overheats after four successive rounds, not two.
-Along with the swords only gametype, there was a sword and pistol gametype (no, not duel wielded )
-The Wraith is in multiplayer and it is a bit overpowered (Bungie noted this in the playing time so it will be tweaked most likely.) It also has a boost.
-You can customize any gametype like Halo PC, even the spawn of the vehicles.
-Lockout was described to house the Flood and study them. Where is lockout located?!
-They "have plans for downloadable content...we want to always keep it fresh and alive and cool and changing it up for our fans"
-Health bar is out-Confirmed.
-Wraith, scorpian, and banshee can all be boarded.
-When boarding either tank, the spartan or elite throws a grenade into the hatch and watch the driver explode while you take the seat afterwords.
-Your level will determine who you get matched up against in Quickmatch and optimatch.