1 : Add back either Falcons, Hornets or Hawks (From halo wars, I think hawks are a good idea.
2 : If your playing Campaign on Heroic or Legendary make the NPC Spartans stronger.
3 : Bring back some popular armor from Halo reach or Halo 3.
4 : Bring back Forge world! I remember having so much fun on that map just by fooling around.
5 : Make thruster pack more useful, make it launch you faster.
Thats all the ideas i have for now, 343i
PLEASE!
Read this.