One feature I would like is the ability to set one of the buttons on the footswitch to toggle between 2 volume settings - normal and lower (or higher) these could be preset with each song or even part of song. This would allow for a more realistic touch when playing a quiet section.
Nice suggestion, this is actually common with the velocity request here - http://mybeatbuddy.com/forum/viewtopic.php?f=11&t=126.