I agree that Mous is overrated and if you have Longoria then get rid of him while you can cash in.
I think you may be giving up just a bit much here but with prospects there are always questions. Pomeranz is def holding it down this year, but so is Shelby.
I read that Shelby is considered a future ace SP while Pom isn't quite on that level (perhaps yet).
20tm dynasty 5x5 w/BB,HLD
5 SP,3 RP