I'm probably in the minority here but I think it's pretty solid.
You have a good top 6.
You have a pretty good defense
You have what looks to be solid goaltending in Samsonov and Woll, although there is a new GM coming in so I'm not sure Samsonov is established as the #1 and he's hurt anyway and we don't know how bad it is.
But to me you have the spine of a very good team.
XXXMatthews Marner
XXX Tavares Nylander
Jarnkrok XXX Knies
XXX XXX Lafferty
Riell Brodie
Lilly McCabe
XXX XXX
Samsonov
Woll
to me you need 2 top 6wingers, you could put Knies and Jarnkrok in those spots and fill that out but then you'd need an entire 3rd line, this way you have the majority of your top 9 set, and also I don't know if Knies should be thrown right intop the top 6.
Your top 4 D is set, bring back Luke Schenn and that fills a spot on the bottom pair.
Goaltending MIGHT be set, but again there is a new GM coming in and it's not like Samsonov was good in the playoffs, he wasn't, and he also got injured so goaltending is where I have the most questions because Dubas isn't GM anymore