I agree the matchmaking ranking system needs as massive overhaul with Halo 4. Halo 2, 3 and Reach have all had their good sides and bad sides, but I feel 343 can utilize the best from each game while introducing something new. As others have suggested, mixing both ranked numbers with arena style status indicators may be the way to go, while still allowing a cR based ranking alongside the evident skill based system. The best of both worlds would probably keep people playing, theoretically, for skill based rank and cR based rank.
Speaking of cR, if it returns, which I imagine it will, it needs to be more relevant, giving you more options to spend on. Basically, expand the armory to include more customization options, such as starting gun skins(?), armor texture and other strictly visual options. With Reach, most people ran out of things to buy fairly quickly, and there wasn't a constant reward from the cR. Also, I hope not all armor pieces are cR based, and that some have to be earned from doing things such as achievements, skulls, etc as it was in Halo 3. I honestly had a lot more fun unlocking armor than buying it, so I hope they find a way to merge both systems into the game.
