There currently is no way to determine which joint in the tree is related to which object
I would like to see the following:
When the joint tree is open and an object is selected, the joints related to that object are highlighted
When you select an object and click "Move/Copy" as if you are going to move an object using joint constraints, the movement should be automatically confined to the joint constraint related to that object. (Of course, you could override that if you would like with subsequent selections in the menu) For example, if you have an item that is constrained by a joint into rotary movement about an axis, clicking "Move/Copy" will automatically select that axis upon opening, without user intervention or selection.
Please make "Move/Copy" modal ie I should be able to move a component, then, without leaving the "Move/Copy", click on the next linked item, move that according to the joint constraints, and so on.
"Move/Copy" should have a menu that shows all joints related to the selected item, and allow a person to delete or modify them while in "Move/Copy".