With Adam gone for good and Ashley out at least for the season, Raf has lost two of his major players, and Nathan will be away at Yale. He should have a lot more time available for Mariah and others.
Again, Ashley didn't say she was out for a COMPETITIVE season. She said she'd made the decision to take an "intentional season of rest"; she was referring to her decision to notify Mariah well in advance of worlds, that if called on, she would decline a spot at worlds. The word "season" may refer to a few months. Spring is also a season. Here's the reference:
https://www.instagram.com/p/BgZcGNqgYHy/?hl=en&taken-by=ashwagner2010
She's also said she'd see how the summer went before deciding about 2018-19 season. I don't keep up with IG stories or other sources, but as of this moment I don't think she's made an announcement either way. I wish Ashley the best with whatever she decides; I want to keep seeing her compete but trust her to do what's best for her, whether that means competing, taking a year off, or moving on.