Yes, I am assuming that Kane could be moved today. Even Kane for a good prospect now is better than him on IR through the deadline. If I could get a top notch prospect now with a conditional 2019, I'd take it and work on dealing Lehner and Gorges. But I am risk averse by nature.
I know it's unrealistic, but why not sit Kane until the deadline? He's a known commodity and the Sabres are going nowhere. Takes the risk out of the equation.