MajorLeeAwesome

the way they described what it did made it sound like a replacement for the grenade launcher, since it fires explosive projectiles.

what is that from so i can read it myself?

Why not choose where the emblem is located?

Do the combo thing that guy on the top was talkin about, accept add this too it... Put a set of achievements in there (similar to the vidmasters) that people can complete in order to become a warrant officer or commissioned officer (Spartan School achievements) so competitive+skilled players can be fully recognized. the enlisted ranks (private-Sergeant Major/Seaman Recruit-Master Chief Petty Officer) are for everyone else. this way people can get motivated about ranking up.

why not have both? Recoil will let the classic halo fans get what they want and will give realism to the mechanics of the weapons in terms of firing them, while bloom will let you know how much the recoil is affecting the accuracy of your shots. Better yet, put an option in there that will let the player choose to have bloom on or off. You can please everyone here.

It would be awesome if they put some COD factors into Halo, like going prone, aiming down the sights, and some weapon customization. As a matter of fact, put a program in there that lets us forge our own weapons! it would also be cool if we could duck behind cover and fire from behind it. Let us choose from multiple Species to play as like Elites, Brutes, Spartans, and Forerunners (if they are in the game, of course)

Precursors are probably in the game, if you slow down the end of that concept art video, you can make out some features of a Precursor, or at least the one taken prisoner, in the last picture (the one after the Halo 4 logo).

Armor should have an effect on gameplay, but not too much. For example: The Tactical/Recon would let the player carry 2 extra mags for their weapons, the grenadier chest would provide +5% health, some other armor pieces would be +2% shields, etc. Just very small differences that would give a player an edge towards their preferred playing style, any big effects would be a no go.

They should use the Halo Reach ranking system, but with a legitimate set of ranks like, for example, the USMC ranks or the US Navy ranks (since Spartans go by naval ranks). And don't cut any ranks out, either, that just sucks. And I know I'm starting to sound a bit picky here, but it would be pretty cool it there were a set of "Spartan School" achievements to get to the officer/warrant officer ranks.