I would be curious to know when those crj-700 deliverys will take place, because as far as I know (and I do not work for PSA, instead AWAC) from all there pilots those planes are on indefinite hold and will likely never get on property.
It depends on what types of aircraft are coming into the system. When Mesa gets delivery of more CR9s, they will probably go back to the west network to replace the flights that were cut earlier. Routes like PHX-BIL come to mind, here at PDX we will probably be seeing one back eventually. Unusual for a station to see only mainline aircraft as we are currently.
Right now, I fly WN exclusively anywhere from 1 - 3 times a week. If US keeps expanding, it MAY be worth the switch for the airline miles. And WN is ending their double credit for business travelers effective March 31 so I guess it is time to compare prices and timetables.