Perhaps, Coto...but I am not so optimistic to think the CAL side will bring on 300 UAL furloughees. They will probably do it slowly for reasons such as you point out. Also, the company can control the floodgates by recalling UAL guys extra slowly if a bunch have gone to CAL jobs...
Also, I am not so sure the CAL jobs will be as popular as you seem to think. There are so many unknowns, that I think many/most with stable jobs will stay put at first anyway. Who wants to commute (or move) to Guam/EWR/CLE indefinitely if the plan is to get back to a UAL domicile ASAP?