Heroes might as well be on that list, since everything after the first season was due to corporate meddling and not what the creators intended at all. They wanted to start season 2 (and every season) with new heroes and new stories, but due to fan favoritism, corporate didn't want to damage the brand by bringing in that many drastic changes, so they were forced to write out cliches and plot-holed nonsense to bring everything back and try to make it stick