From a furloughed UAL guy here, and Copa NG Captain:

That would probably be a pretty bad move going to UniCal, unless the JCBA is signed. First year at United/CAL is $31/hr and CAL's reserve rules suck bad. I am likely going to bypass the "recall" offer to go to CAL unless either Copa starts to get annoying or the JCBA is complete.

Just my opinion