Neither Weiland, nor Doubront, nor Lavarnway are garbage. Weiland didn't have a good start this afternoon but he's proven he has big league stuff, showed some poise after getting hammered, and showed some signs scouts are going to like seeing. Doubront has already proven he can hang in the big leagues in either a starter or relief role. Lavarnway has an impressive hitting pedigree and is improving behind the plate at catcher.
All prospects have flaws. All 3 of these ballplayers have impressive assets to offset those flaws. They should be desirable to other GM's.