Recent reviews by A Lonely Ghost

Bought MCC at launch to play campaign with friends. It took 343i six months and 2 additional game launches (only in PC time, the whole thing's been out on xbone for a while now) to acknowledge that the coop netcode is different from competitive and causes all clients to have unacceptable input lag.
Not just regular lag.
Input delay.
With the release of Halo2, they have finally publicly acknowledged the issue by saying, essentially, that there is no issue and they have no intention of fixing the 'issue'.
343i has no idea what they are doing with porting this over from the Xbone, and don't care about you as a user. Avoid this.