-No join game in progress
-More playlists (like FFA, Team Doubles, Team Snipers, etc)
-More vehicles like the falcon
-NO FLOOD MODE, or an option that disables flood mode and allows for regular infection
-change infection online (custom maps like in halo 3) Flood mode and infection from Halo Reach is too short and not fun anymore.
-Get rid of emblems / replace with something better (face it, no one even uses emblems in Halo 4)
-Less over-powered secondary weapons (I like the boltshot, but I hate how a secondary weapon can beat the sword in a duel). OR more overpowered power weapons (like the Incineration canon). I like the idea that everyone should have equal access to a primary+secondary and power weapons should be rewarded for kill streaks (and should be very overpowered)
-maybe custom gun skins?
-less perks, not all perks end of being equal and it usually ends with everyone using the same perks
I would also like if your loadouts consisted of:
-Primary
-Secondary,
-Grenade,
-Armor Ability,
-And the option to choose either Sprint or Evade (and get rid of thruster pack)
I feel like having some people with sprint and other w/ evade would make the game play better online.
-Fix the glitches that H4 has picked up, like glitchy ordinance drops and whatnot