Columbus wMiller

The tricky part for any Miller trade is whether or not he can be re-signed and whether or not the Jackets have to pay a ridiculous price to shed cap again to make space for what he wants. If either don't go the right way for Columbus than the trade makes no sense.

They can get rid of Voracek and resign Miller with that money and the cap they have.

Aaaand that's the catch. The price to dump Voracek is likely ridiculously high. If they have to do that to re-sign Miller then the price to get Miller to begin with is that much higher. It simply doesn't make sense to invest that much of the future in a single player with a few good years left.

They could get rid of Gudbranson which won't cost them that much most likely and sign Miller.

I'm starting to suspect you haven't thought this through very well haha.