Sure I don't, I'm not bob burton so I can't decide what happens with the WCA. I'm just giving my opinion on events being removed and added to the WCA, I'm not actually going to try and get 15 puzzle removed if it gets added. But the community should decide what events are added. (thanks for the poll on removing feet). I'm sure that more Cubers are interested in twisty puzzle events than something like 15 puzzle. Also, strawman argument with your first point, good job. 15 puzzle may be a puzzle, but the only similarities I can think of that compares it with traditional WCA events are few. I can only think of 2, 1. It has commutators, 2, all of the pieces are kept in a confined state for the solve aside from pops. Maybe you could say there are different solving methods, but that can be said for most puzzles that are not 1 solution like separate x from y. 15 Puzzle would be fun but I'm sure that other events would not only fit better into the current WCA, but the community would enjoy them more than 15 Puzzle.