It's not like Slafkovsky is exactly in an entire level of "proven".
so I expect his value to be Seamus Casey (better then Mailloux) and 1st round pick.
Slafkovsky was thrown to the wolves and sucked before getting concussed for the rest of his rookie year. Then he sucked for half a year before turning it on and looking like a beast.
Nemec baked longer like Defenseman do and then was thrown to the wolves and because of injuries to top defenseman on the team and ran with it and looked like a top two pairing guy.