Koemen rotated midweek, so the only rotation I would expect for this game would be taking off a regular or two for subs at the hour mark. Same for the Copa game that follows this one.
Savilla is a quality team this year, they should be too good for the current Barca. After losing these two games, Barca can focus on the youth for the remainder of this season. No Copa, no CL, probably 4th in Liga. Get used to it, next season likely will be about the same. The re-tooling of the entire squad necessarily is a multi-year project. Maybe three core players will go over the summer, for instance Busquets, Lenglet and one of Dembele or Greizmann. No, their replacements for next season will not be better, at first they likely will be not as good. Got to try something different, even though this will be painful short-term.