For example some headings I see a real need for:
NAME [default now], DATE[created, last modified] SIZE, TYPE[meta-type], USER[default=owner], DEPTH, COUNT, CHANGES, PROPERTY, DISPLAY
This is just more dtml, since most of the mangement interface is done using dtml-in over a simple set of objects, this should be straightforward.
SIZE How big is this thing? When I look at a graphic is it a thumbnail icon or a hires scan? What about PDF What about folders - how to calculate the size of folder?
That might be a little more tricky and slower if you want to try and calculate the size of a Folder containing many objects. That I would say is not terribly important.
What woudl you like to see when you click on manage?
Id like to see this configurable so I can choose these options.