It's so nice to have so many folks that can help with questions like these! :-)
I have only one thing to add here, and that is in response to the comment that Focus Points are just Groups with a different name. This is misleading. Focus Points are referenced groups - meaning that if you have channels (parameters of fixtures) set to reference a Focus Point instead of simply setting levels for those parameters, you can update the Focus Point with new data and ALL CUES that reference that point will have that updated data on playback.
Groups do not perform this function in the Express/ion line.
Stepping back into the shadows...
Sarah
Sarah Clausen
Controls Product Manager
ETC, Inc.