I think this feature would work best on a 2 or 3 monitor setup. Clicking on the MIDI or Instrument Arranger Track would display the associated plugin wherever it was last present onscreen. Typically, this would be on the second or third monitor. The plugin size/scale would be remembered along with its position onscreen when displayed.
Selecting a different Arranger Track would display that track’s associated plugin on the same screen and at the same position on that screen (centering the plugin window based on its vertical and horizontal dimensions).
By having at least two monitors, you could always have your plugin’s interface appear on your second (or third) monitor whenever you click on a MIDI or Instrument Arranger Track on your main monitor.