MLB.com draft preview:
"While Stott does show off a plus arm at times, the one area there's a split camp might be his ability to play shortstop in the big leagues. Most give him a chance to stick there, given his makeup and instincts, unless the team he's on has a better defender on the roster. At the very least, he'll be given the opportunity to do so after hearing his name called in the first round."
"There are teams that think, despite his size and atypical throwing stroke, that he'll stay at shortstop and hit for some power. Those teams are highest on him. Then there are teams that think he'll just do one of those and, finally, those who think he'll do neither."
And Fangraphs in their last Philles ranking:
"I had him projected to stay at short last year and there’s basically no new info on this end, but not all the four corners scouts, who saw him play defense most of all, thought he could"
To come to any conclusion other than that scouts are divided on whether Stott can play SS would be wrong. It is not dissimilar to the Bohm discussion even if Bohm is worse defensively.
We simply do not know if Stott can play an average major league SS.