D pairs are messed up
Why pay Hyman 6 mill?
Why pay Kahun far more than he should get?
Why Armia
Why Gally?

The odds seem to suggest Turris will not be able to redeem himself next season, but if he wants to to try there is no reason not to give him the opportunity during training camp. If he can't make the team, he can be placed on waivers for the purpose of reassignment. There is a very slim chance another team will claim him, in which case Edmonton will no longer hold his contract and the salary implications. Its more likely he would clear waivers, and then he can be assigned to Bakersfield. Once paced with the Condors, Edmonton will carry a $525,000 cap hit. When the season is over, the contract expires and Turris and the Oilers can go their separate ways. It doesn't make sense to buy Turris out.

It seems apparent that Hyman replaces RNH, Armia replaces Chiasson, and Galchenyuk and Benson replace Ennis, Nygard, Neal, and Shore. Personally, don't feel the roster improves with those changes, at least not as much as it could improve with perhaps some different choices. The deployment of defensemen might work, but it looks less than idea.

Armia=Depth
Gally=Depth
Sorry about d pairs
Not really a big overpay on kahun
Hyman=Worth the 6M

Hyman looks very much like a replacement for RNH, on the second line, and not a true 1LW. I think, 5x5 is the maximum should be the Oilers offer. If they do sign Hyman, I hope it is for less.
Perhaps Kahun might break out with another season in Edmonton, but right now I don't think he projects to be a viable 2LW. Signing both him and Galchenyuk seems redundant to me, even though both contracts appear to be low risk. Frankly, it looks to me as though the left wing is populated with three third line and one possible second line forward.
RW is not a priority, but it could be improved. I'd be okay with Armia, but I wonder if the money is better spent on upgrading the goaltending, or bringing in a potential 2RW to push both Yamamoto and Kassian.