Donny, i work with 3 basic types of registrations..

1) Basic registrations that set up the keyboard in a certain way ( pedals , mic and such), this is where i start from while creating a new performance
2) Performance registrations, which sometimes have a full bank of up to 8 registrations, these can easilly be used to step to the next part of a performance.. you can use them for minor but also for very drastic changes, like stopping (part of the) style, changing tempo, muting tracks.. anything possible..
3) Voice registrations, these change the voices of the keybpard only, this works very much like the keyb sets of the PA4x.. I have a map with Jazzy sounds, and a map with Classical sounds.. and more, just an easy way to contnously change your voices.. with the same style playing...


And there is quite a few other ways to use this feature. Now if you dont have need for number 2, as you seem to indicate, maybe the other ways still would come in handy.