I don't know anything, but my perception is that it's easier to pitch-lab invent/tweak/develop/improve a breaking ball than a change. So the optimist in me thinks that suppose you're choosing between two rotation prospects: one has a good breaking ball but not a change, the other a good change but seemingly not a breaking pitch (Wicks). I think I'd probably rather go with the guy who needs to conjure up a good breaking ball rather than the one who needs to conjure up a change?
Velocity-wise, the reports said he touched 95 every game, but was resting 92-94. In today's game, that's kind of pedestrian velocity. Still, I'd think a commanded 92-94 is functional and usable. I thought some reports referred to favorable spin, and to deception, "invisiball". So yeah, **if** he could add a couple mph and be mid-90's, that would seem to support a good enough fastball to be an asset rotation guy.
On the flip side, I think a lot of college pitchers can throw harder because they are always pitching fully rested, one-week rest. Pitching on regular pro-rotation, I suspect a lot of guys are pitching a little tired a lot more often.