Maybe she saw how successful Taylor Swift's album was and she wants to try to achieve the same success with Max Martin? I mean, I don't mind if this will lead to songs like Who Knew, U+Ur Hand, I don't believe you and Please don't leave me. I was happy to see TTAL bring her a lot of success and it would be amazing to see her get even bigger with the next album. I also want her to collaborate with other artists again like on TTAL. And with Sia she would make a huge hit.
I, too, would like to see her going in a different direction, but I'm not in a hurry.
Btw,
indeed at P!nk saying she is doing meet and greets all the time... She herself has said she never does it because she is hypochondriac, etc etc. And I don't want her calling all artists like Britney and JLo amazing. She is too nice nowadays!