Currently, the only ways to edit the controls and properties of an object are:
The problem with the above is that they all require editing the properties and formulas individually. The "Advanced" tab gets a little closer to being able to quickly update the properties except it doesn't always seem to show all of the properties and if the property isn't already a formula, you have to enter one in the formula bar first.
It'd be awesome to have the ability to open all of an object's controls and properties in a single text box displayed in a JSON or XML-type format. This would allow for users to be able to go in and quickly edit all of the properties in a single place, and better yet is that it would allow the copying and pasting of data from similar objects. As is, editing something like all of the colour/fill formulas on a dropdown box or combo box is a bit tedious, but having this as an option would remove that tedium.
Personally, I'd like to see it so that it doesn't update the canvas until after a button is clicked to accept the changes simply to allow for bulk updating without the application constantly trying to apply changes and slowing down the editing.