I can speak for me only and I think he can be what he's shown. Not Bob Gibson and not Jr Richard. I do think he's perhaps in the camp that needs to learn how to PITCH. I remember your post on his stuff and I don't think it's backed up enough to invoke Julio Teherans name. He was probably sitting 93 this last start..above average, but 96 a couple of times, but that curveball is still a weapon and his sinker better.
So the realist in me says if he can be a 4 I'm OK with that. I dream of more but as a few have stated, it remains to be seen.