Agreed Happ is a wasted spot but I don't see why McGowan should be moved to the BP yet and who would you call up this early? Stroman? Jenkins? All things considered McGowan has done good for a 5th starter and no one expects him to be pitching deep in to games. More expectations should be on guys like Morrow & Dickey, even Hutch to be eating more innings. Think of McGowan's 3 starts... His first big league start in 3 years was home opener (no pressure) and his last start was in 0C weather... Cut him some slack.
Happ on the other hand, who know what to do. If they can get just an ounce of worth out of him being a long arm when games are out of reach, they might be able to salvage something via trade, even a pick and eat some $. Jays are too cheap to buy out his $4.5m contract and they can't send him down from veteran status.