I heard a lot of feedbacks about not being able to queue only in a certain gametype, having challenges in CTF and not getting a game, making the battle pass harder to grind, etc.
IMO, the Match Composer from Halo MCC was almost PERFECT for social play. You could select gametypes you wanted to play, The only thing missing is that It would be nice to queue in multiple game size (1v1, 2v2, 4v4, 8v8, 12v12) . You guys did an awesome with MCC social playlists, and I think you should continue on that design