Return: Melina. It hurts to see that Mickie is back in WWE full-force and Beth is in the HOF, while Melina is only a side character in their legacies. I would have her return to SmackDown Live as a heel, and since this omniscient power gives ha the power to compete at her best, I'd have her be a major challenger to the Women's title and feud with Asuka, Charlotte, etc.
Release: Lana. I was going to say Sarah Logan because she doesn't impress me at all, but Sarah's unique look saves her. Lana doesn't add anything to the angles she participates in; her husband has reached a character high without her as his manager and there are already better hot blondes on the show with her. She's never gotten out of first gear in the ring, so issa release.
Repackage: Sonya Deville. While she and Mandy are a fun team, she has as much potential as a singles star as she does and doesn't need to be attached at the hip to her. Have her beat local talent and show some new moves, generally being portrayed as a baddie while Honda and friends stay on Raw for the foreseeable future.