You have no idea what kind of leader any of these dudes are. I see John Wall playing hard every night, saying the right things in the media and staying out of trouble. He's doing enough he's just not ok with his team or his career being stagnant. Who can blame him...
I know neither of them are front runners. All of those things you mentioned are fine, but that's not the end-all for leadership. Wall has poor body language at times and defers in the clutch.
PG13 and Lowry have the respect of their teammates because they've proven when it comes down to it, they'll step up and win you games or give it all they've got. They'll live with losses being placed solely on their shoulders.
Wall passes the ball off to the other guys and shies away from the big moments. I've seen this repeatedly. Pierce and Beal hid his lack of intangibles last year imo. Outside of the "Big Bs bytch!" I can't remember big shots or clutch moments from Wall. As I've said before in another thread, if you're down down 12 and want to cut it to 4, give it to Wall. If you want to win, give it to someone else. And I am a fan off Wall, this is my fair criticism