Slafkovsky and Reinbacher are way more impressive as prospect than Kotkaniemi was as an 18YO. Also, potential generational talent dont fall to 5-7ov, come on... i am as high as the next guy on Michkov but lets calm the generational label.
Also, it is not a bad thing to pick a riser. Its actually a very good thing. Its just feel uncomfortable because for us unknowledgeable fans, they are not comforting names that we hear since their D-2.
You want your young player to be on a steep uptrending curve. Dont be afraid of that.
The biggest red flag, along with a shitty attitude, is lack of growth/stagnation in a young. Wright lack of growth between his D-2 and his DY is hugely, hugely concerning for example.
This is eerily similar to some stock market concept, when a stock rise rapidly in value, for example 80-100% in 3-4 weeks and makes a new all time high, the crowd is often afraid, think its too richly valued and are afraid to buy it. Little do they know that a stock that has doubled rapidly really likes to double again!