It's fun to imagine jelly Shiina, but I do hope nothing too extreme happens because.... we joke about it with all Vtubers, but Shiina is literally Menhera, not like "oh she posted something crazy" but she has shared her diagnoses.Best time window imo will be in the space between her donothon and just after gen 3 debut - if her donothon goes well she'll be riding a high for a while that she'll want to defend from potentially being stolen by shiny new gen. Too soon and you just end up with a spoiled meemaw, too late and she decides the cookies are just like any other simps and will leave for something new.
Shall prevail
It's really great that's she's working on it with exercise and healthy life choices, but it still exists. I guess all I can hope is that her fans are sincere and don't try to mess with her emotions just to get a reaction or what not. Also I hope she stops fucking up her sleep schedual.