Carolina says no. The value is lopsided in Colorado's favor. The other issue here is simply that the deal is too complex. There's too many moving parts. Multiplayer deals this size with real calibre players dont happen in the NHL for reason. They are virtually impossible to balance.

I think a starting point is Duchene for Slavin adn Roy, and a pick maybe.

so CAR gives up the two most valuable pieces for what? Duchene isn't worth Slavin/Aho alone so you cant go adding 1st rounders and other young players for nothing.