I agree with @kalibean, the wide variety of judges helps represent the wide variety of fans. Not to mention I can't see J&K taking dance advice from a bunch of other dance coaches (except kitty) when it comes to auditions. Sure they like opinions for various choreographers in TC but I feel like auditions aren't meant to make specifically dance based decisions, those are left for camp.
I happen to like Neal McCoy, yes he always says "she's hot" etc but that's probably a heck of a lot nicer than what most guy fans say on game day to their buddies. Plus, he always comes across as warm and supportive. He and Kristi Scales are nothing but positive for the girls, or at least tactful with their critiques.