I agree, however I have a few concerns. One of my concerns with your analysis is that there is no correlation of the players True Skill number for any given class. For example, do the hunters at the top of the arcblade category have a higher True Skill than the defender titans at the bottom? Given that many players have three characters, one of each class, it is easy to assume that a certain number of people will select their class/subclass based upon a pre-determined meta. As you eluded to, the current meta is an exotic handcannon/shotgun. Combine that with a choice of mobility options and super abilities, then one can start to see why certain builds are higher or lower on the leaderboards.