It seems to me that one of the biggest related problems with chess is that the quality of the player rating system has not kept pace with the development of the game.

If I am an ok player and memorize a complex line and a handful of tricks I can beat enough players to raise my rating. If I leave that line my rating will fall. Am I a better player?

The player rating systems might benefit from a “play style diversity” or “flexibility of approach” indicator to expose players that rely on one-weird-trick traps.