The autotune doesn't annoy me very much, and I don't think the production sounds cheap like some people have stated. In fact, I think it will sound massive in a club setting.
It's just the lack of melody that really gets to me. When Beat Again came around, I couldn't believe that the boyband from X Factor had managed to get everything so right - brilliant production, massive chorus, albeit with a dodgy video! But that didn't matter because the song was brilliant, and refreshing. This new single, on the other hand, just doesn't command me to listen to it more than 3 or 4 times.