The main issue with This Is How We Do is the same issue Peacock had - it may smash, but it wont exactly have a positive impact on her image and is not going to encourage album sales. Songs like Wide Awake, The One That Got Away and Unconditionally would've barely made it into the Top 50 if she was known as an act who releases random novelty throwaway pop fluff.
See: Thinking of You. If that was released after the three hit KO of Teenage Dream, Firework and E.T. it would've done a lot better.