KXOT cannot stay off the air unless within 10 days from June 30th, the licensee files with the FCC indicating such, and this normally lasts just 30 days. 47 CFR 73.561 (c).
Extensions are possible if they are still off the air if the cause is beyond the control of the licensee. I would argue that PRC knew about this for over a year and had plenty of time to come up with an arrangement. So I fully expect KUOW to either turn things back on, or as an alternative, hook up with KEXP, KBCS, KNHC, KGRG, or KMIH with a temporary simulcast.
I believe the FCC rule is that you can be off the air for 30 days, but you do need to file an extension if you wish to go beyond those 30...an STA filing would be needed for such cases.
I assume that the license holders for KXOT are well aware of their responsibilities in this matter.
Perhaps we'll hear something along the lines of your suggested folks pertaining to 'simulcast' on the station...except for KASB; they were still throwing a dead carrier as of 130pm this afternoon.
The simulcast partner is going to be someone with cash on hand; the bank that holds the license will expect nothing less. Therefore, most of the stations you mentioned will not be simulcasting anytime soon on KXOT until the bank gets desperate....