I hope there is a good way to organize your characters into "folders" of some sort. For example, in the current CB, I have:
Current: for characters I'm playing now
Dead: for characters that I would be playing if they weren't dead
Future: for characters that I plan to play soon
Experimental: for character concepts that I probably will never play
Also, I like to keep old versions around, so it would be good if it were possible to archive them. Sure, if you are rigorous about retraining, etc. in the current CB you can just de-level the character, but there is no way to de-level your equipment, notes, etc.