I know, as an interventionist myself, that it can seem frustrating to make group notes to several teachers. However, I have realized that "copying and pasting" is not very complicated for most days. I try to write the "bones" of my lessons in the CCPensieve for one member of the group before the day starts (lesson plans, so to speak), and copy those to each member of the group. Then. when I am working with the small group, I add any particular comment to each student's record.
I think this is at least as easy as writing the info more than once. I think the "overarching" idea with the group feature is to share info, but add specific notes for each student.
I do know that the developers are working hard on this and other member suggestions to update the CCPensieve, but I can't say when these will do updated specifically.
You might also share your concern through the CCP on the "contact us" link at the bottom of the page. Hearing from members will certainly be appreciated!! 