I think the Crouse for Hutton/Gaunce is an interesting idea. The Nilsson trade is also very realistic.

However, the Ducks trade doesn't make sense for Anaheim. They are already very deep on defense and with the likes o Larsson making their club next year and Montour and Manson looking for even more ice-time, I don't see where Tanev fits into their D-core.

I think it'll be tough to trade Gagner with his cap hit and even though Eriksson's contract is outrageous, he is still a very serviceable 3rd-liner and it's not as though the Canucks need to dump salary as they'll have tons of cap room over then next couple years.

Also, shouldn't the Ducks get more for Silfverberg if they actually want to trade him (I realize he's up for a big payday in 2019)? Something about that package doesn't seem right to me, though I can see both sides of the argument.
Interesting propositions overall...at least you didn't have us signing Carlson or Taveres!