I think it is really great trade..
Storen's average fastball velocity fell for almost 2mph from last year and his opponents batting average is 0.307.. Although his control is ok, it is not good that he is allowing too many hits.
Benoit has similar velocity from last year and he throws harder than Storen (94.0mph).. His opponents batting average is 0.211.. If he can find his control and minimize long balls.. He will be one of 7th inning guy.. or put in pressured situation