Revit MEP features Duct, Pipe, Conduit and Cable Tray all have a dialog that permits us to edit their information, chief among them is their sizes. Unfortunately the younger brothers, Conduit and Cable Trays, have a extra button, the Modify button that lets us easily change a setting for a size. The older brothers Duct and Pipe don't, pity! It's just like parents to let our younger siblings stay up later and easily modify their size!
In the must be nice category, the Cable Tray size portion of the dialog.
In the wishful thinking category, the Duct sizes.
Also in the wishful thinking category, the Pipe Sizes.
I wish it was as easy to add this sort of functionality into Revit as it was to copy and paste the modify button into these images!! I vote for component size equity!! Let us modify them, let us modify them!