From Kuu's Insta from yesterday.
Kuu has completely finished DNA now.
She says it was a long way and there was the problem of too many songs (genres) to choose from. There are a lot of different songs on the album and it is her most genreless album so far. She wants everybody to get the final result fastly.
I guess, she means that here in the sense, that she did so many songs/genres and still wants to do others in her career and that's who she is, what she likes, so it was hard to come up with it and narrow it down. 推し曲 means "proposed songs", but also has the notion of "favourite songs".
She shares parts of HAIRCUT lyrics here.
Getting a haircut "with the scissors of new possibilities". Nice.