The number one thing I'd like to see from Kuznetsov is improved defensive play in all three zones. Of course it would be nice to get offense and production but that aspect of his game is not about effort. He is not seen open lanes, isn't scoring on his shots, isn't threading the needle on his passes. These are not issues that will be corrected through him trying harder.
Just don't be such a defensive liability. He is a versatile player. Carries the puck on the power play, can handle big minutes on the penalty kill. Combine that with even average defensive play and we can start talking about him having some value, even as a 40-50 point player. All that the Caps need Kuznetsov to do is play a responsible enough game so that they can offload him at the deadline without having to attach assets (with some retention if need be), instead of having to buy him out or punting on another year.