I recently asked if there was a way to change all my groups from Fully Featured to Traditional without going to each individual group. Everyone told me a variation of "NO".
I have since discovered that I can go into "My Email Preferences" and under "Options" click on "edit". All the groups for that particular email address can be changed at once by this. Of course, if you use more than one email address for your groups (which I do) you have to change each separately, but this is a lot easier than going to the individual groups.
Just thought I'd share, for those who belong to groups that require the "Traditonal" setting or just prefer it..