I think the problem is that this show (and others, like American Idol, etc.) has decided that the judges are a huge draw. Now that judges across the board are big names, and big "personalities," they assume that we care about them just as much, if not more, than the contestants, maybe because the judges will be there for multiple seasons (presumably) whereas contestants are generally forgotten fairly quickly unless they make it to the final rounds of the competition.
This is exactly it. I feel like all of these reality shows have become more about the judges and the contestants get lost in the shuffle. It's why I think the AI contestants of the past few years aren't selling as well as their predecessors from earlier seasons. And why nobody really cares about The Voice contestants once they are off their show. That show is really all about the judges. That is why people tune in. The same with The X Factor. And I'm sure the AI producers were real pleased with themselves this season for hiring two divas with the world's biggest egos who can't stand to be in the same room with each other. SYTYCD is the only show I watch for the dancers and I thought the show was just fine without all the celeb judges and their antics. I'm also beyond tired of Nigel.