I'll have a go:
1. Rosemi Lovelock - Voluntary graduation.
Known history of corpo-hopping, so this whole business with Pomu and Selen might prompt her to consider her options. I don't see her going down with the ship if things really get shaky. Where to, I don't know, Holo seems to be the only real corpo option, maybe indie if she still has her PL or go for a new identity entirely.
2. Fuyo Cloverfield - Voluntary graduation or stage 1 of corpo dissolution.
She seems to have been shaken by the entire episode with Riro Ron. The collaboration with Brave group also introduces a lot of unknowns for Idol in general. The only caveat I have is that I don't see a viable exit route for her yet, but in a corpo re-structuring/dissolution scenario, maybe Aviel can give her the option to keep the model and go indie.
3. Miori Celesta - Indefinite hiatus/finally gets nepo'd by Bae.
This would hurt me the most, but I do feel that we're closer to this scenario than last year, when it seemed like she would go on indefinite hiatus for med school, but dropped out and came back. Lots of RL problems, plus very high levels of menhera. I could see her taking the Holo option if she feels like she needs to hit the reset button, particularly with the way her fanbase has taken a turn for the worse recently. She's alluded a few times to having the Holo audition form open, and that this might be her last year as Miori. Only caveat is that she's built up so much as Miori, whether in terms of following, industry contacts or simply sentimental attachment, that it's enough to make anyone reconsider. On the other hand, a particularly bad menhera episode could send her over the edge and make her take that leap (figuratively, not literally, I hope).