I don’t think they’d drop the ST so overtly, it would probably do the opposite of restoring faith in Disney Star Wars. It would be an embarrassing scandal and a major signal in a lack of faith in their own capabilities. They might sweep it under the rug, but does Disney even consider it worth sweeping under the rug? They’re making a Rey movie, after all.
I think what Disney Star Wars would need to become popular again would be a new generation, sub-franchise, series, idk these things are supposed to be called, with compelling new characters to be the new face of Star Wars for the next decade. I think that’s what they were trying to do with The Mandalorian, but it didn’t pan out and I don’t think the first season was designed with that in mind. I don’t think these characters are going to get a second chance.