[Gizmo]

I am no computer wizard but I think you are right when you point out processing another pane could be too much for OF. I still think this would make a better interface.
I dont think Screen size is an issue. In context view I only use the top third. You are really only looking at a couple of actions at a time and the rest of this pane is not used.
Also I think you would find a new pane in an existing window is neater then a the current system of a second window.
I use the focus in a new window all the time. its a big part of my workflow for all the reasons i mentioned before.