Here's my wish list of equipment:
-Bubble Shield: Make it a bit smaller and a shorter deployed time.
-Deployable Cover: Make it auto destroy after 15 seconds.
-Flare: Give it a longer deployed time and make it capable to be destroyed.
-Power Drainer: Same as Halo 3.
-Regenerator: Make it capable to be destroyed.
-Gravity Lift: Same as Halo 3.
-Trip Mine: Give it the ability to stick to vehicles and instant kill if shields are down by a sliver.
-Auto Turret: Same as in Halo (Campaign).
-Cloaking: Same as Active Camo except it only runs for 5 seconds.
-Overshields: Same as in Halo 3.
-Active Camo: Same as in Halo 3.
-Jackal Shield: Can only be used with a dual wieldable weapon (SMG, Plasma Rifle, etc.).
That's all I can think of right now.
[Edited on 07.03.2009 9:29 AM PDT]