I know that the most recent State of Production post has addressed this by saying that queueing for multiple playlists will be possible, but this, in my opinion, leaves room for a somewhat troublesome interpretation.
It has been made clear that Ground Battle is not a playlist Push players or Frontline players want. I was in the wrong to advocate for their being joined together in the past. And I hope that moving forward, we will have the option to check specific modes we want to queue for instead of just a multitude of playlists. This isn't as vital in Cooperative, but is absolutely important for PvP.