Watching today I still think the Phillies might be deciding between Haseley and Herrera for the last outfield spot. There really is not a great reason to keep 6 outfielders. Cutch and Harper and Joyce are givens. Quinn seems likely at this point too. That is why I would not dismiss Chatham or Maton coming back for the last bench spot.
Right now in the bullpen you have Neris, Bradley, and Alvarado at the back end. Kintzler, Brogdon, Hale, Velasquez, and Coonrod are the others. I guess a 9th would be off roster for the moment (Feliz or Mitchell) so that is unlikely.
That means, assuming everyone including Miller is healthy, the battle for the 24th and 25th roster spots are between Quinn, Haseley, Herrera, and Chatham/Maton. Two of the four will make it. Another factor for another middle infielder is Miller's ability to play defense at the moment. Clearly Segura is the backup SS, but is Miller even ready to play 2B or 3B?