I'd rather give Shaw a long runway. I'd love Cease, but it's important to balance the need for a TOR pitcher and hope for the future. He'd cost a lot of prospects even if they could get SD to move off of Shaw. If you add the unlikelihood of resigning him it stings a little more.
I don't know their plans, but, it still looks like they will play up to the next CBA and then clean the slate expecting a long work stoppage. If that is their plan, Cease makes a bit more sense.