I greatly dislike Flinch, as it adds a random factor to long range combat and it is very noobfriendly, and too sniper friendly. Descope had much greater skillgap and it was more intense to play with.
However, as Ninja said,
I imagine that 343i would need to devote more time and work to reintroducing descope to the game than you would at first think. Ninja said 343i said it would need a title update, and I myself suspect that a rebalance of the sandbox would be in order as well. For example, descope is a great nerf to the light rifle, while the carbine will actually become better because the fast RoF makes it easier to keep enemies out of their scope.
Nevertheless, I'm still keeping my fingers crossed for the reintroduction of descope in this game or the next, because it is one of the few remaining things that stand between current H4 Team Throwdown and a hyper competitive game.
I dislike sprint, and I prefer small maps with fast default movement speeds... But Halo 4 has designed the game much better around sprint than Reach did, so it isn't that bad anymore. No sprint still has a larger skill gap than sprint, but sprint gametypes are now pretty competitive as well. Against my own common sense, I wouldn't mind sprint staying with Halo for the other installments. But we at least should be given the option to create no-sprint gametypes.
PS: Funny how OGhostayame basically posted the same Poll as I did about a week ago
, and his poll got 1500 votes within a day, and I've only got 30 in a full week. Ghostayame deserves to be listened to though, so I don't mind :)