I hope what im about to say is already being worked on. (Really do) But what I think this games multiplayer needs is Rumble Pit, multi team (2v2v2v2 version not 3v3v3v3) Big Team Objective, Assault (not griffbal only, make it like it was in reach where assault is the base mode and griffball is a custom mode), take out all the single game type modes and make a playlist like in halo 3 (Team Objective), please bring back One Flag it was amazing, I propose some light weapon balancing in loadouts (Theres no way I could test this before posting about it so bear with me here) but my idea was making the DMR a 6 shot kill instead of 5 it dominates all big team maps (as it should) but it is too fast of a kill imo. I think it would be worthwhile to try some play testing with the dmr being a 6 shot kill. The BR is fine imo because it is for small maps and so far I feel that it is in the right spot. The auto matic weapons are fine the suppressor is a fast kill at close quarters (much like dual smg’s in halo 3) the AR is like its always been a nice balanced weapon, but I feel tha carbine needs to be 1 less shot kill. Although it has the fastest kill time, its easier to miss 2 shots with the carbine then it is to miss 1 with the dmr/br. If those 1-2 shots get missed because of spamming with the carbine then you lose the fight, again I cant test this myself, but I feel this might be something worth checking out. The only other thing I could say I hope is added in the future is a sandbox type map for forging, because although I love the new features for forge the 3 maps are extremely small, and have too many prebuilt “things” like the holes in the gound and the structure on impact, or the entirety of erosion is made without forge in mind (I know that the air space is availible but all 3 maps have air space to forge) and Ravine is (sorry to say) the worst forge map in the game 
All 3 maps have rediculous restrictions and are quite small. I hope that if 343 looks at this they at least consider some of the stuff I have said, or at least reply with ideas even though it may sound like I am bashing the game which I am not. I just wish to help 343 improve the multiplayer by adding those small things, and (im assuming that the 3 announced map packs arent the only ones for the entire existence of halo 4) that sandbox or something of the like is a map for forging. Thank you 343 if you look at this, if not then I understand and hope you dont see this because you are working on some of the things I mentioned above 
Thanks! - Gecko
Oh my god, please format that into something I can read.