They can not do this. there is not enough playlist slots in the game for them to do this. Plus it would fracture the playerbase too far by doing this.
It used to be this way, but with the addition of other game modes and playlists like face off and community playlists several of the stand alone playlists had to be moshed to make room and to prevent the playerbase from being split to far.
So even though you may not like it, this is how it is going to be for the game.