I read that it was put back because the first single Want wasn't getting any airplay. I guess they are thinking about doing another single which will hopefully will get more airplay before releasing the album.
I think Want is a great song, but it is very different from the type of music she has done in the past. It's a song I could see Madonna or Kylie singing rather than Natalie.
Besides not releasing albums very often, she changes her style a lot. It confuses people. They don't know if she is rock, dance, pop or acoustic. It's nice to try new things, but most artists with a loyal fan base do have a signature sound that they stick to with only minor variations.
As far as touring, she has a great voice, but she doesn't have that strong personality on stage that makes people eager to see her live.