The "Momochi" character and her "Yurushite nyan!" gag were based in self-deprecating humor. People loved to hate it, and they were supposed to. That's why it worked.
In contrast, Kanon played her "Cinderella Revolution" gag straight, and it wasn't much of a gag to begin with. She simply
told you she was the reincarnation of Cinderella, did the pose, and then went right back to being Kanon Fukuda, third-tier idol. As if she expected the pose itself to catch on.
(For an explanation of the tiers of idoldom, start here:
viewtopic.php?p=28807#p28807)
So yeah, it was dumb.