It actually makes sense to release IKYWT next.
WANEGBT is dying down, she released BA to country right between Never and the next song, now trouble can be sent to pop a few days before the album release, while BA is big and WANEGBT is dying, gaining more pop hype for the album- also keeping some country hype.
And when she finishes with that send Red to pop and country and you've got her biggest hit ever
well if she's gonna release dual singles this era.. i'd much rather she does it now than later!! now the singles can play off the hype of the album and maybe both of them will smash!