Well, it could have been worse.
A few fun throwaway lines here and there. Not sure anyone, anywhere, ever was excited about seeing the American Idol judges on the show though.
Hey now, the Critic crossover was against Groening's wishes (though it's hard to imagine him refusing something like that now). I actually loved the Critic episode though, and it even took a few clever jabs at crossovers themselves.
But yeah, The Simpsons have never been strangers to these types of episodes, ever, the X-Files episode being case and point. It's not a symptom of the "new" Simpsons.