I'll admit, the Mayor's had some moments. But let's be real—the show isn't exactly 'Breaking Bad'. Don't get your hopes up for some gigantic character arc. She's better than before, sure, but it's still pretty basic stuff.
Humdinger moving away would be the logical step, but then you gotta think about the narrative structure. He's the main antagonist, and his character serves as a catalyst for many episodes. Kids learn about resolving conflicts and problem-solving through his antics. Plus, where's the fun in a show without a …