Veteran teams like the Cavs seem to prefer former player coaches like Lue. Who also aren't afraid to tell it like it is (e.g., will stand up to Lebron, which Blatt would not).
KC Jones was not a great x's and o's coach like Bill Fitch, but was a better coach for that team because he knew the player's mind set better, enough to get out of the way of the players.
Why I like Stevens is that he seems to be a blend of a great tactician while at the same time lacks the ego of those types of coaches (e.g., Stan Van Gundy, Bill Fitch, George Karl, Larry Brown). That is very rare in the NBA coaching circles.