Honestly, I think a music only release would be just as controversial, in a positive way, as her releasing with visuals these last two albums.
It would mark a major shift and that would be a major talking point lol That's how you keep an audience on its toes. ATRL would probably call it a "gimmick" cause she led people in with the expectation of visuals and then threw them off or something.
That said, I don't think she'd do that. She loves visuals too much