Once you make the request, post the link here so that other users wanting the feature can vote for it. More the number of votes, better are the chances of it to be noticed by the Adobe Engineering team
o, no folders are available in the page panel. But your idea is not bad. You should file a feature request as it would help others with the same problem.
I think I would prefer a nested folder structure for parent/child parents. Say Parents B and C are both based on Parent A. Show a triangle similar to the one next to folders in the Finder or Photoshop’s Layers panel so we can show or hide child parents.While they are at it they could certainly use the space more efficiently. There's a lot of dead space between the page names and the thumbnails.