It's an interesting idea, but this could optimize the wrong thing. You already rely on function x heavily, so why should this function be featured more prominen

It's an interesting idea, but this could optimize the wrong thing. You already rely on function x heavily, so why should this function be featured more prominently? You obviously have no trouble finding it. Only because someone doesn't click on a button for some time doesn't mean he won't in the future. Why not suggest a playlist with songs you listen to the most instead of making the searchbox bigger? Why not suggest songs to listen to next instead of hiding the genius bar?