One of the possible improvements that could be made in Oxygen is a way to quickly access the controls or buttons to add the various elements in the editor.
I have created a plugin that makes adding the elements in Oxygen a breeze.
Once installed and activated, it adds a thin bar centered and attached to the top edge of the browser which when hovered, pops down to show the controls.
When hovered/open state:
Clicking a control button adds that element inside the currently selected parent container.
Moving the mouse away hides the bar.
Watch the video below to see this in action: