I find that sometimes 4 focus groups isn't enough as I switch between scaffolds, but usually I only want two focus groups displayed at any given time. What I'd really like is the ability to name focus groups and then hide them and then later restore them into arbitrary layout panes. It would be nice to be able to merge focus groups as well, but I'd like a setting where I can indicate then when cutting the number of panes in the layout that instead of just merging focus groups, it should stash the ones that are disappearing.
All of this may be in ST3 - I haven't jumped from ST2 to ST3 yet - so my apologies if it is. I plan on jumping once the next beta is released.