Still think the concept of an album as is should be abandoned and instead making a singles collection mixed with some album tracks every couple years is the way forwards.
So, like;
Era 3:
August 2013: Legendary Lovers
November 2013: Dark Horse
March 2014: Waking on Air
June 2014: Birthday
September 2014: Roar
December 2014: Spiritual & PRISM
February 2015: It Takes Two ft ?
April 2015: International Smile
... Obviously I blew all the single worthy tracks pre-album launch, but you get the idea. Treat all the massive songs exactly like lead singles to maximise the potential smash, then release the album and do a couple traditional singles whilst touring etc.
(This is my reply re: planning the next decade of Katys life, but I'm trying to minimise how crazy I look. Replicate this a couple times with gaps for kids though.
)
They better prepare for a lawsuit
i hope you had a great day!
It should have been even a 1 week #1. 
