If you have a number of performances selecting one of them single-step-wise by the rig cross buttons is a pita. The buttons should perform autorepeat at least.
Even more I'd like to use the browse button to browse through performances rather than rigs. On stage I need to be able to select any performance quickly. I would not want to edit the performance by selecting a different rig. So what the browse button currently does seems useless in an on-stage situation.
Anyway soft button #3 is currently unused in performance mode. Why not activate this one to enable browsing through rigs if needed.