I agree that he would be seen differently, but a top 5 pick going back to the ohl and then also having a a mediocre AHL Season (reversing the NHLE formula for Bennett's last season, not a perfect science, gives him 56 points in the AHL) and people would still be floating the idea he's a bust. I think Dylan Strome is somewhat comparable in this regard, although he now appears to be doing quite well down in the A.
Obviously this isn't exact, and the confidence built by Bennett dominating the OHL for a season probably would have left him much better off in the long run, but the numbers he has put up over two full seasons in the league are very concerning for his future potential, in spite of his flashes of skill.