Have to disagree with the original premise. Sure, it's getting more difficult to upgrade my BOS-SFO trips (see below), but CR-1's are what keep me from jumping ship to AA. I get 8 CR-1's and 6 SWU as a 1K. AA would only give me 8 SWU-equivalents as a 1K equivalent. That's a huge difference.

Still, UA are nuts to put A319's on BOS-SFO/LAX. They are constantly weight restricted, never mind having less chance to use my CR-1s. Oh yes, sorry, that's the plan!