People are ignoring the kind of pitcher Stroman is. He just doesn't have the super elite secondary pitch you need need to rack up those K's, in addition to an elite fastball. Stroman, i think understands what kind of a pitcher he has. He seems to have unusually good command of the sinker/2-seamer, many sinkerballers struggle with command and can't find the strikezone at times. For him the tradeoffs work and he's simply maximizing his talents. If he tried to rack up the K's and rely more on his 4 seamer instead of his 2-seamer/sinker he would be less effective in addition to not going as deep into games as he can now as a sinkerball pitcher.