I wouldn't mind if she stayed a vampire. It's weirdly grown on me and I was WAY against it at the beginning of "Curse of Mutants". I like the idea of seeing her struggle with the dichotomy that comes from being a creature that hates light and yet a mutant that creates it.
Hopefully, if her powers are back, we'll see her using them a bit more to their full extent on a regular basis. She is a vampire now, so she has less control of her baser emotions and Jube's powers were always connected to her emotions. X-ternals Jubilee blasted the hell out of things.
Also, let's hope Marvel remembers to instate the rest of her power set with her plasmoids.