The chart seems to vacillate from most important power to signature power depending upon the hero. eg. Captain America is under "Super Strength" when his signature ability is "Discs Throwing Mastery" of his shield while Wolverine is under his signature ability "Claws" while his most important ability is "Super Healing". Still a glorious chart.
Batman would be listed on almost all of the Mastery category. He certainly would be on almost all the of Martial Arts category. As well as many of the other categories since Batman is often stated as one of the most dangerous characters in the DC Universe due to his abilities and drive despite no super powers.
Sandman doesn't turn into sand, he is sand. He should be under Shape-Shifting just as Clayface is.
Restructure Reality doesn't have the Beyonder.
There's probably more but that's what I saw on first glance. Something like this would be much better if it could be expanded but I would think the list would be incredibly huge.
Fun to look through regardless.