Perfume seems like it will be the exact opposite of WB, which is good. People need to see that side of Britney and it should (hopefully) get them interested in the album.
This could be a big career song.
In the last years she released uptempo songs with playback performance with meltdowns about her dancing.
This time IF she will perform we'll have a ballad with live performance.
A new a totally different side of britney, this thing will create curiosity about her new album