Good Joulevi retrospective here from HF
Why was Juolevi drafted so high?
He was 6'2, moved well and had a very good first pass out of his zone.
He came to the CHL and lucked out by playing behind one of the most dominant lines in Junior Matthew Tkachuk - Christian Dvorak - Mitch Marner.
His ability to pass the puck obvious worked well with such a dominant forward line that dominated the opposition. It masked a lot of his defensive weakness. The fact he's soft and has trouble winning puck battles along the board and front of the net.
Goes to the WJC where he again played behind Puljujärvi - Aho - Laine. Again that line dominated. and he picked up 9 assists in 7 games.
Any draft eligible defenseman producing well at the U20 naturally will get a ton of hype.
That's when his stock started to skyrocket.
Still he didn't even finish ppg in the CHL, and in his draft +1 when the marner/tkachuk left, his production stalled. He goes to the WJC again, no Aho, no Laine, and he finished with 2 points in 6 games.
Basically by draft +1. The writing was on the wall, his ability was overrated by who he got to play with.
But most importantly he can't defend. And when injuries hit, game over.