Been about 3 years since I actually played CoC so detail are bit fuzzy so forgive if I make mistake but what was wrong with it?
Since, well, it was a pretty nice simple twist. You were never ment to protect your village or people. You were sent there as a sacrefice, as nothing more than tool to appease the beings beyond the temple or something like that. . But now, since you are free of any obligation torwards them, you can chose what you want to become. To either actually turn yourself into lands savior or its ruler. It makes everything more personal. And frankly, much better from power fantasy perspective since you being the chosen one is not what made you the "champion". You being you is what makes you cool.
It also kind of removes to some extent narrative-dissonance from players perspective. It serves as justification for why supposedly pure champion can get so corrupt so fast. Since, well, once again, they are nothing special. It removes any sense of hurry on players side since they do not really need to save the word imidietly. We learn that it is already ruined, so it is up to us make most out of it. As wise man once said "things can not really get 120 percent more fuck".