I missed Smeltzer's first start, but saw most of the game last night. I think he's showed enough to be first in line when there's a starting vacancy (rainouts, injuries), but with less than dominating stuff, he needs to have good command and keep ahead of counts. Smeltzer isn't going to give up four homers every start, buthe's a far better pitcher when he's pounding the strike zone.
From what i've seen of him he doesn't have the "heat" to blow hitters away with his fastball so that means pin point accuracy, deceptive delivery and good offspeed stuff to compensate and get guys out multiple times through the order. Not really sure he's got enough to be a starter in the major leagues but time will tell.