Frk is last for me, detroit takes forever to bring up there prospects so his impact will be way later than pirri or kucherov. Pirri i think could be a 50 point guy, Kucherov i think is a guy who might really be a big time point producer. So i would rank
I expect all to be top-6 players. Kucherov will be the biggest game-breaker I would expect, he could be the main scorer on a 2nd line or a more balanced offensive player on a 1st line with a goal scorer (Stamkos). Pirri looks like he'll be a 2nd line centre going forward in Chicago being more of a playmaker with great vision but still using his hard shot to score. Frk looks like a 2nd line sniper/PP specialist obviously possessing one of the hardest shots in junior this year, if given the time in the AHL he could be an hugely important offensive dynamo for Detroit going forward.
My ranking (using max potential) + point estimation is as follows:
1. Kucherov: 30-45
2/3. Frk: 30-35
2/3. Pirri: 25-40
Frk doesn't have the size questions these other two have and he does have a pretty nice ceiling. Not surprised to see him losing out, but is important to note he is 6'0" 203lbs. So he has 20 lbs at least on these guys to go along with his terrific shot, that isn't everything but it should be noted. Does have the concussion on his record too, but just saying not big concerns on the where does he fit in physically in the league.
Pirri should have a big chance to get run as the #2 center in Chicago and he is at a different more proven point in his career.
As electrifying as Kucherov is, watching him play at the pro level at his size is going to be worth watching. That is going to be a rather large step up for him.