I won't speculate about Kuu and her career.
She does what she and her team think is the right thing and I actually doubt she will change that much. Of course her themes will change a bit, but nobody can say further things.
She already mentioned being a cool and sexy mama.
By the way Love Me Back is still in the Top 20 (PV even Top 10) in all sections on recochoku. Over 2 months already! It's her most successful fast song digitally this year.