[whpalmer4]

What I do is double-click one of the items to be rescheduled, bringing up a window focused on the containing project. Switch to project mode and fix up the due dates, then jettison the window. Most of the time, I will need to change other dates (or at least check for the possibility) so I don't find this terribly burdensome in practice.

Where/when do you envision the action group parent appearing in a context mode view? The children might be scattered all over the view, and if it only appears when all the contained actions have been completed (as has been suggested elsewhere) it wouldn't seem to offer any help for your scenario, would it? I guess you could have the parent appear multiple times, but that certainly won't win many style points!