This is my idea for the perfect Halo (Of course, this is all my opinion, but I’m sure there are some that agree.)
No bloom (Bloom on DMR confirmed for H4, but not on the BR)
1-50 (or even 1-100) ranking system based on winning to level up.
Grenade damage lowered (just a tad, compared to reach. Halo 2 or Halo 3 grenade damage preeze)
Bleed-through melee damage. (If you have half shields and no health, one melee should kill.)
Faster run, higher jump (confirmed for H4 already)
Battle Rifle 4 shot (speculated/confirmed? 5 shot, unfortunately)
4 player theater. (Nobody wants to watch a film alone, that’s not the point. I stopped using theater completely in Reach because of this.)
Ability to enable/disable kill zones in maps. Allows for glitching outside of map boundaries in customs, exploring the previously unexplorable. I don’t know what it was, but a solid key memory of Halo 2 was all the butterfly swording and rocket jumping and super bounces out of the maps provided many a time of enjoyment)
I will add more if anyone wants to provide good, constructive ideas for improving Halo and the speed of Halo gameplay, trying to return it to it’s roots instead of following a CoD/BF3 guideline that it seems to be going.