These are very good videos and Simon St-Laurent does an excellent job analyzing prospects.
With his 2023 draft rankings, provided with breakdowns and video, St-Laurent had Simashev at #7, well above Mckenzie's anonymous survey of 10 scouts, which had him at 19 in the final rankings. His tools were so intriguing that Arizona "reached" for him at 6.
Similarly, Yakemchuk has a set of tools the Sens won't be able to pass up. No defensemen in this draft class compares to his size/skill combination, and all the defensemen in the target range have their question marks. For Yakemchuk, it is his short area quickness and hockey sense. Short area quickness will be easily fixed as he grows into his body(less than 200 lbs). The dude is powerful and his straight-line speed -forwards and backwards - is explosive once he gets going. The hockey sense question is a non-issue. It is easily a plus- he makes beautiful reads all the time, including cross seam passes that he creates on his own with his high-end stick-handling.
And if you watched his games, it becomes readily apparent that he was the driving offensive force on his team and his mistakes were simply him trying be the savior, because he had to be for that team to have any success. Parekh played with 9 and Dickinson played with 10 players already drafted by NHL organizations this season. Yakemchuk played the grand total of zero. He was playing with a bunch of nobodies in relative terms. Imagine if Stutzle played on a similar kind of team in junior? He would be forcing stuff all game long - making risky plays that don't work( he does that now! ), but most time they would work - just as they did for Yak. And yes if you watch the games, the announcer calls him Yak.
Yakemchuk has elite tools and really good hockey sense to be impactful on offense and defense. If the criticisms of hockey sense are overblown, which I, as many others believe, he will be an absolute stud - a star. As St-Laurent says, he has the most upside of any D in this draft.