I really like Kotkaniemi's compete and hockey IQ but his play is very messy which worries me a bit. By messy i mean he's just a bit all over the place, his passes aren't crisp (he makes a lot of those hot potato passes which are hard to handle), his skating is weird because his turns aren't clean (his skating technique needs A LOT of work), there's a lot of pushing/shoving when he has the puck (a bit like Gallagher which isn't necessarily a bad thing) etc.
His shot is good and his puck handling is good, he just seems very raw right now. Of course that could mean he still has a lot of room for growth (very young player) but there's always that risk of a player not developing how you want him to. The thing he really needs to work on the most is definitely his skating, his speed is ok but his technique needs way more refinement.
He's a very intriguing prospect tho, right now he's a smart/high compete/good puck-handling player with a good release who needs to work on his passing and skating technique.