Maybe 2-3 guys picked in the entire 2nd round end up being good NHL'ers, sometimes less. Look at 2014- best guys are Compher, Jarry, Lekhonen, and Bertuzzi. Maybe 30% end up being lower level NHL'ers who end up with 300+ gp. guys like Martinhook, Trenin, Sissons, etc. The hit rate on players in the late 20's isn't much better.
Going by those numbers, we can only expect 1 of Marat, ROR, Lambos, Peart, Firstov, Haight, Lorenz, Kumpulainen, Heidt, to be a good(not excellent) NHL'er. Maybe 1-2 more to be decent NHL'ers that will play in 300+ games.
Hunt was a 3rd rounder because he had injury problems during his draft year. 2nd round talent, to me. Stramel is also a 2nd round talent. I would throw them into the group above.
Lambos was well thought of, and some thought he had middle of the first round talent, but his draft year was kind of messed up because of Covid. Post draft, he performed well, but questions about his decision making persisted.
If i had to guess, I'd say that one of Kumpu and Lorenz might make the NHL as big, gritty 4th liners. At least one of ROR, Hunt, Lambos, and Peart will play 300+ games in the NHL, while the others will get in a few games.
One of Marat, Haight, Heidt, Firstov will be good NHL'ers, with 500+ GP. At this point, For the sake of argument let's say Heidt.
Getting a middle six Heidt, middle pairing Hunt, and a 4th line Lorenz would be about the most we can reasonably expect from that clump of players. And that would not be bad drafting... that would be league average, if not a bit better.