Is there a firm timeline on how long China flights may be suspended? If not, I don't see much schedule shuffling as there is (a) no time to market new flights, and (b) China schedules could resume but would need the shuffled equipment back. I could only see one-off aircraft upgauging day by day in some markets that already see those aircraft; e.g., they aren't going to put a 787 on a DFW-SMF run when SMF is not practiced or supplied (parts, etc.) for the equipment. Otherwise, some aircraft will just enjoy some down time.
The service suspensions by the US3 announced up to now are speculative as to the ending date, I think it's fair to say. "Best guess" on the part of the airlines, based, as I heard on NBC Nightly News, on guidance from CDC.
And I don't think we're talking about "schedule shuffling" but rather equipment shuffling...upgauging certain flights to widebodies that are demonstrating heavy demand.
As to aircraft "enjoying down time" it was said in another thread (I forget which one) that United at least is considering, or maybe actually planning at this point, on doing a deep-clean/decontamination on those aircraft, which apparently can take up to 24hrs. So I could see that during this China suspension they, and probably AA & DL too, might rotate all their widebodies thru such a process. I think it would be prudent given that CDC and WHO have now been saying that the virus can linger on surfaces for a good while.