Yes, it's about searching within the iRP app, not the forum (that one could also be improved, though)
Filtering styles, not the ones from the player which I understand, can be change without going through editing.
Creating playlists by styles is not an option for me. It would take way too much time to create those playlists from a 4k+ song library, and it would need to be updated regularly.
I was just thinking of having an "advanced search" option where we could choose which fields to search/filter (title, composer, meter, style, key)