Is Sano even a cautionary tale as a hitting prospect? I don't think Sano is out of the league because he can't hit or the high Ks caught up to him, as he has a career 115 wRC+, it's that he ballooned in size significantly from his time in the minors and became a full time DH, and that's where the good-not-great offensive output cost him. The defensively adept version of Miguel Sano is Joey Gallo and he's been a very valuable player in his MLB career. If Orelvis is somewhere in between those guys as an ~80 power, high Ks guy with a good defensive home the Blue Jays are taking that every time in the developmental process.
Now, he may not be either of those, because it's true that both had much better success as 20 year olds in AA and higher prospect pedigrees than Orelvis seems to have. But my point is, so what if he's Miguel Sano offensively? Couple that guy with even passable SS defense or say, above-average 3B and that's a very valuable player under cheap team control.