Eh I thought the same at first but I don't think it's too bad. He's already 24 and pitched 90 pretty good innings in AA last year. With no minor league baseball this year it's probably fine to give him innings at the major league level.
I think that 12 MLB starts would be more beneficial for his development than sitting around at the reserve-squad and jerking off.
Will be interesting to see how he fairs for the rest of the season