swingbabymix,
interesting idea.

It seems you are proposing something inline with arrangers. Where hardware mounted screen is limited and you need to get where you need to get fast, not so convenient for casual browsing. What you show does make sense, however, have you seen how Halion (or Halion Sonic) deals with content picker? See attached. It is much more involved than basic 20+ dropdown choices, I find it interesting how they handled it. Not very obvious from picture, but there is a search field also, and ability to "rate" instruments for easy "favorites" access.
There are a lot of things to keep in mind in BIAB, especially a "type" and content.
RT, RD, MIDI, SUPER MIDI, LOOPS, USER TRACKS. Genres, tempos, feel and much, much more.

Bottom line, I agree that picker has to be re-imagined, but I think fuller picture is needed.
I proposed this some time ago:
https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=638288

It would definitely make more interesting to have something similar to what you proposed, but before that, ALL creative content has to get consolidated into some kind of tabbed or similar picker...

So +1 for categorized view option

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