Firstly Lindholm is playing on a rebuilding team not the top offensive team in the league. Secondly, a two way center has a lot of value. If Lindholm was just a 54 (55 now) point winger, he's value would be much lower. Realistically, Lindholm on a good team is a 65 point two, 30 goal, shut down, second line center. Very valuable. Like Denault. The ability to shut down top centers in the playoffs is massive.
The fact the top team in the West sees Kuzmenko as expendable says a lot about his value. He could have value to a rebuilding team that can pump up his offensive numbers, but that's not something the Flames are good at. It'd be career suicide for Kuzmenko. The flames expect two way play from all their players and offensive specialists don't succeed.