Rig order has been discussed in several threads but I think you can rate them with the Stars and sort by that not sure if the date changes or not when renamed. At work right now and don't have Rig Manager on my laptop. There is also a lot of feature requests for Rig Manager that have been made and probably will come out soon, like Performance editing.
As far as cabs go, I don't find myself switching them that often because there is so many profiles that sound good the way the original person set them up. I found the best way to do things is audition the profiles through Rig Manager with all the files on your computer and then put the ones you like on the Kemper. Keeps the number of Profiles you have to browse through to a minimum and also makes start up's faster. HTH
I'm sure some others will chime in also with some great ideas. Only been working with the Kemper for about 5 months, love it though.
Nick