Yzerman was ranked the top pick from the OHL in 1982-1983, but generally, his draft year was considered a slight disappointment compared to the year before. Some of that was the Peterborough Petes system holding his numbers and icetime back though. He was ranked first by The Hockey News draft preview and third by NHL Central Scouting (behind Lawton and LaFontaine). The biggest issue with Yzerman (and LaFontaine) was generally considered size and strength, Lawton was bigger and stronger at that age, and American highschoolers had previously entered the league in the early eighties to great success so there was a bit of hype for Lawton.
Those concerns would obviously be obviated in this soft ass league context, and I think Yzerman in today's league would be right behind McDavid. I also think he'd start out the gate faster, the issue with Yzerman in his early years is that he was generally clutched and grabbed to oblivion, and his ascent to superstardom was due to him working on his strength a lot starting in 1986-1987 (the year before he dropped weight to like 160ish, to become even quicker, and yeah, in a league where clutching and grabbing started to become big during the mid eighties, it worked out poorly lol).
Also, Yzerman's major knee injury happened early in his prime, and it did rob him of some of the top end speed he had before, but again, very unlikely that injury occurs today with the way the net moorings are.
Honestly though, it would really be his peer Pat LaFontaine that would benefit so much from today's league, he seemed to have that last bit of top end speed that even pre injury Yzerman at least didn't showcase as much, and he also played a more north to south game which is exactly what the rules and systems allow and encourage in a way they didn't in the eighties and nineties. LaFontaine was fearless and always drove to the net, and today, he'd simply not get rocked as much and could do it like McDavid. Whereas in today's league, I said Yzerman would be just behind McDavid, I think LaFontaine would definitely challenge McDavid for league's best player.
Scouting report on Yzerman in his prime:
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