Bottom line is people don't want a dumbed-down ride experience compared to existing rides. Since most new rides have Pixar themes and most new rides provide dumbed-down experiences, it's easy to put 2 and 2 together, and blame Pixar.
However, real stinkers like Superstar Limo & Golden Dreams show that it's not the brand, but the content that deserves the evaluation and subsequent praise/criticism. These days people like attractions that deliver great experiences. People don't want a cheap experience, they don't want an over-processed experience, they want a great experience, regardless of movie-based or not. There's no guarantee movie-based or original will deliver a good/bad experience. It's all about what the powers that be allow it to become. That's what will really matter in the long run.
-- PMM