Sandin and Lilly clearly have NHL talent. They are just 19/20 and have never played against players/teams this good before. Also they are playing with each other, and at times being exposed to other teams top lines.
They'll figure it out.
That rush by lilly when he recognized that Moses split the neutral zone, and jumped up, gained the zone, and ripped a wrister from the slot was something else. Didn't know he had that kind of shot. He's going to be good. He moves the puck so well. He's got some strength too. I think I may agree with whoeever said he has more talent and upside than Sandin. Think he may be a good fit for Rielly in the long run.
Sandin's hockey IQ is great though. He just needs to get stronger and gain some experience.