There need to be many reforms to gymnastics and one of the things has be abolishing the top 2 rule and allowing everyone to see the best compete against each other not pretending there's equal quality in the world.
I think, but I'm not certain, that the Russian champion is also left out of the AA because of the top 2 rule. This is exactly what happened to Wieber in London. Heck, she was defending World AA Champ at the time.