Here's some of my Halo street cred: I've gotten every Halo Achievement to date, the highest level and maintained a mininmum 2 k/d ratio in every Halo game.
With that said, I know Halo. And this is what I believe is wrong with Halo 4:
1. No 6v6 playlist - not even Dominion any more..... which is a gametype commendation. I'd really be chapped if I hadn't finished it already.
2. Backing Out - I generally have a decent team running with me but it takes us 20 mins to actually play a game because everyone backs out when they see our k/d / lvl. What ever happened to manning up and sticking through a game? If you backed out of a Halo 3 ranked game, for any reason, your lvl dropped. We're catering to children here...
3. Balanced Weapons - Again, we're catering to scrubs when we let an assault rifle at mid range consistenly beat a what would be perfect 4 shot BR. Also, insta-kill boltshot on spawn? At least make it like the Mauler where you needed a shot and a whack, adding a touch of skill to the kill. 2 shot BR with damage boost? Get out.
4. Horrible Host Selection - If someone isn't in North America, $10 says they're host. Then they quit out and it gives host to the person who is most likely to quit out next.... and so on.
5. The Indestructable Mongoose - It's as strong as a Mantis. Honestly, to get a "vehicle destroyed" medal on a mongoose is virtually impossible.
6. Unreal Commendation Expectations - I had a friend just spend 20+ hours on killing Crawler Snipers. One example out of 20.
7. Missing Game Types - Mainly Assault, 1 Flag and Territories... but for these game types we would need unbalanced, non-symetrical maps and since children need things to be fair, symetrical maps are all we get.
8. Gametype Ranking System - Everyone needs to get on their computer/phone/tablet to find out what their rank is in a certain playlist... Just throw it up there. Although it might make people back out faster if they see a bunch of flaming 50's....
9. Plasma Grenade Magnetism - Catering to children again. I remember when a stick was hard to get and gave major bragging rights over friends.
Aside from my personal gripes, I really enjoy Halo 4. I still play it quite frequently and can't wait until the next Halo comes out! Cheers!