SYTYCD limitations

So, we have been watching the new fall season of SYTYCD and I must say I have been really disappointed at the people who didn't get through Las Vegas week. Mostly they are people who are outstanding in one discipline but who struggle to do the others. After seeing the "best of" show for the last 5 years, did any of the judges learn anything? It seems not. Evan's brother Ryan will not be in the top 20. Neither will some of the really great breakers, the Memphis bouncer and the girl with p...