One of my friends and I have been talking for hours on end about how Halo: 4 could be improved. We totally agree on everything in your post, and have a few ideas of our own:
Change the Scorpion and Wraith. FOR GODS SAKE, I am SICK of the Scorpion being able to destroy pretty much anything in 1 or 2 shots, and also reloading. Don't get me started. It is WAY too fast. I don't know about you guys, but a big tank like that, even IF it had some sort of auto-reload function, would not be able to reload that fast. Also, too accurate and way too big a range.
Moving on, the Wraith is UNDER-powered, too inaccurate (the projectile curve is a little over-exaggerated, and so slow you can simply walk out of the way), and the Wraith itself is way too slow. For some reason, I am constantly killed by the machine-gun turret, rather than the gunner. The only thing that the Wraith is useful for is to make Warthogs flip.
Falcons. Yes, I know that they are a great vehicle, and we all enjoy them in a whole. But, I would love to be able to use the passenger seats as well as the turret seats. Also, possibly the Falcon with Machine gun attachment? Possibly it would only be available on Forge, as it would get f**** annoying on Matchmaking.
MORE GRENADES! I want the famous Brute grenades, and perhaps a new UNSC or Forerunner grenade, since it is a Forerunner world-ship-thing that you see MC being drafted into in the teaser.
That is all from me for now, please comment and tell me what you think.
Until next time, move out, Noble Team!