Any Miller deal has to be stone dead. I dont know how on earth the Penguins could swing it salary-wise today without significant retention, from Vancouver or a third team. And that is never going to happen on an 8 year deal.
The only thing that could possibly happen is a major roster member going back. The Granlund deal essentially put that out to pasture. Not unless someone like Rust or Granlund (lol) is going back in return.
Edit; Empoleon just said the same thing.
It'd be similar to the Leafs trading Kessel 1 year into his 8 year contract... PR wasn't an issue because everybody knew they were rebuilding which is what the Canucks probably should do (at least a mini rebuild where you tank this/next year while keeping Petersson/Hughes and a few other younger players).
That's the analogy right there. It must've been annoying to be retaining money on Kessel while he was winning cups in Pittsburgh, but the leafs cut bait and rebuilt properly, and look at them now.