This may be a once in awhile type thing or a never for some agencies. However, I ran across an issues the other day where I needed to consolidate 2 sub-accounts that were both part of the same agency and there wasn't a way to easily select all the contacts and merge/copy over to the other account without exporting and re-importing. Would be a great add-on if possible. This way all tasks, notes, etc. would be moved as well.