Being quite old, I've been to amusement and theme parks many many times over a good number of decades. Just from an eye proof of popularity, these types of lands, if they are
timely relevant IP's, seem to attract really large crowds of parents and their young kids. Of course, they're not for teens and 20/30 something singles, but the rest of the park is essentially theirs.
KidZone essentially became outdated and died because of that . And, as Nick said in another post, the small crowds picked up a bit when more relevant IP's appeared replacing Barney. That's
kind of proof of the pudding. The redo for the zone with newer IP's that are popular with kids should rejuvenate the crowds.....and....a more crowded new KidZone should help ease the USF capacity
problem by diverting more people to that currently nearly dead section of the park.....It's a win win.