I understand that the OPs offer doesn't make sense for the Avs, but a 4th and a 5th for Soucy is a much bigger joke of a proposal.
Other than not scoring, Donskoi has not played badly this season. He's worked hard and has been positionally sound, but I think he is a guy that benefits from chemistry and familiarity. Hakstol plays everyone with different linemates every single game. Donskoi should have probably close to 8-10 goals, as there have been at least that many times when he was open and in perfect position to tap the puck into the net, but his linemates chose to shoot the puck wide or into the goalies chest instead of passing it.
But I agree, with his current numbers he doesn't have much value at the moment.
Soucy on the other hand is playing great hockey as a mobile two-way defender. I doubt a late 2nd would be enough to convince Francis to move him, let alone a 4th and 5th,