Obviously you don't have Spooner in your groups above, and he might be dealt. If you move Spooner though you team becomes dangerously thin at C should anyone get injured.
Honestly when you look at it from those groups. You need a 2nd line winger. Honestly I think there is significant room to improve upon Nash as 3rd line C, which of course improves your 4th line by putting Nash there. And while Gryz has played well, there is a legit chance to improve a good bit there.
I don't disagree with the notion that there is a potential backlog, especially among LH shot wingers. (Heinen, DeBrusk, Bjork, Cehlarik, more coming), and same at LHD . Still you need to be careful in deciding who to keep and who to lose, and you need to find value for those you do move. ANd of course you need to find a dance partner.
Let's say Simmonds who you suggest. At what cost? Does Zboril, and Cehlarik get it done? Probably not. How much more, do you have to add a JFK or a Frederick , now you are suddenly taking a hit where you are not as deep? do you send the #1, which you might want to preserve as it spreads out talent and gives you a potential ELC player for when this generation of prospects becomes expensive.