Peter, Roger, Toby?
Is there some easy byte to twiddle in a file somewhere to either (1) fix this, or (2) prevent Borgbeat from being selected by the Autochanger ?
The visuals.bin file is written (mostly) in ARM assembler, so it won't be obfuscated by the compiler, although it might have been obfuscated by Toby's coding style

I only saw the API documentation for the visuals once (yeah, we did have some), but ISTR that there's a table (or a table of tables) near the front of the file that points to the visuals. It might be easy to knock out the Borgbeat one from the list.
Mike or Toby would be the go-to people for the info, though. Or maybe John G -- ISTR that he and Toby reworked some of the visuals for v3.