Correct. UO, UW, Cal, and Stanford won't be making any serious commitment to the PAC with the possibility of a BIG 10 invite. They'll want a loose agreement that provides no obstacles to leave for when they get the call.
The four corner schools need to read the writing on the wall and jump to the Big 12. Maybe SDSU can come along to retain some semblance of a footprint in CA for recruiting. ASU, UofA, CU, and UU need to be making arrangements. You might even force UO and UW to come along with you for a bit.