Many of the songs I use do not end with dramatic outros. Them simply end on a note that revolves the song. After about 12 hours with my new BB I have found a way to end songs without using the built in outro. When playing that last note/beat strike both foot switches at the same time, thus pausing and playing a cymbal crash at the same time. (my foot switch is right/pause left/cymbal crash) Then, with the song paused I have my main pedal set to end song by pressing and holding.
Its not a permanent solution to what I need but with lots of practice it will be a nice practical solution.