What would perfect it for me is a ribbon-controller, or XY pad. An extra couple of EGs wouldn't go astray either. Along with Jupe/TB filters.
Mebbe even a jog-dial for speedy patch selection in standalone mode.
Also an XY joystick (as on the Trinity/Triton) instead of wheels, but that's just a personal thing.
BTW, BBE 7 days one week rocked. Classic era that, along with Born Slippy, Wink - HSOC, Professional Widow, Ripgroove, Firestarter, Salva Mea, etc... ahhhhh, them days, them days!!....... smokey clubs, bangin house music, pissed as a nut, bliss...