Here's the situation: Original itinerary was EWR-IAH-SJC on an S fare, RPU applied, confirmed in R on both legs. During the latest round of schedule changes, the late IAH-SJC flight disappeared off the schedule, so the auto-rebooker simply moved me to the next earlier IAH-SJC flight. The new IAH-SJC segment is booked in R, which is good. My original EWR-IAH flight was left alone, which, while still in R, arrives at IAH after the new IAH-SJC flight departs, which is bad. My questions are: Because all of the earlier EWR-IAH flights are devoid of confirmable R space right now, if I call to resolve the schedule change and suggest an earlier EWR-IAH flight, will R be offered on the new EWR-IAH leg, or will I be back in my original booking class (S) and be waitlisted for R?