First all I will do my best, this is not a hate thread, I love 343 and Halo 4 immensely. I will try to take this a topic at a time.
Instant Re spawn, I love it and hate it. I do feel that it negatively impacts competitive play, what about making it optional, like have it in some playlists and not in all, like in MLG or slayer pro take it out. That way everyone is happy.
The Maps. I love them, no input here, would love to see another Halo 2 or 3 map remade by you guys (I gotta say color makes a big deal lol) But other than that I love the new original maps. I think all Halos have had a great map or two at least, I liked countdown and zealot from reach. But would love to see construct or guardian, but I understand if they are too small to work with 4.
The guns. Again no change here. I like them, feel that they are as close to balanced as they get. I can understand people wanting a 4 shot br but it’s not balanced in this game, I would have to say adapt on this one. It wouldn’t be any fun if every gun was equal, a plasma pistol having the same kill time as a br or dmr and all. As for scope I say keep it the way it is as well, just my opinion is all.
The Playlists. I really appreciate all you guys are doing to get us content as fast as you can, I can’t wait for team snipes as it was by far one of my favorite playlists aside from MLG of course. I hope one day it becomes permanent along with doubles.
The join in progress. Same solution as Insta spawn. Make it playlist specific. I like being able to hop into a friends game without waiting. Yeah I don’t like losing a game that is already lost, but at the end of the day I don’t think my record is me ya know? Like if I am a good player then I shouldn’t be worried about my service record but my in game performance, it doesn’t happen often enough to where I think it will ruin anyones records, if you are good, you will win the majority of your games. Sorry for the rant here 
I can’t think of anything else right now, I love halo 4, it is quite possible the best game I have ever played. Yes I played Halo
s 2 and 3 and Reach, and I know Halo 4 is different in a lot of ways, but to me at least it is an incredible game and I will play it every day for as long as it is online.