Because it is just a filler. It is those kind of songs you'd hear on the radio by boring artists such as Colbie Caillat (who wrote the song) or Jason Mraz (who I hate). That's why I don't love the song. It's ok.
Because people on ATRL seem to think that each new pop song should be so innovative and experimental that it creates an entirely new genre that revolutionises the music industry.
Because its not single material and its certainly not comeback single material. After a five year hiatus I am extremely underwhelmed. She didn't need to do anything "ground breaking", all she needed to do was make something that doesn't sound like elevator music.