343i`s Frank O`Connor explains why Halo: The Master Chief Collection couldn`t be fixed earlier
(Windows Phone Central)

When Halo: The Master Chief Collection released, is not only contained all of the Master Chief games, but it also contained a lot of problems. Matchmaking didn`t work and there were bizarre issues like continuous lag when playing online co-op. 343 Industries tried to fix the game, but even after months, it remained in an almost unplayable state aside from the single-player campaigns. Even though The Master Chief Collection is currently functional, it still has a lot of problems. ...