A planned patch for Master Chief Collection has been postponed. The patch was include a closed beta that would of been used to help with games' matchmaking problemns. 343 has said that the update will help with matchmaking, search success, lobby functionality and the overall experience with the game. The company had this to say about the update.
"As this update contains the biggest changes to the Matchmaking system yet, we’ve identified that additional time and testing is required, and we are currently evaluating both timing and need for a CU beta with the Xbox One Preview program, as well as the final public release date in February," 343 Industries said. "We’ll continue to provide the latest updates here on Waypoint."