I agree this would be useful. It's one of the design choices I made early on that I would change in retrospect.
I plan to implement this as new FSM, State, Events and Variables Inspector windows that can free-float with the ability to turn off the Inspector panel in the main editor. This gives you some flexibility, e.g., have the Variables Inspector open to debug at runtime while still looking at the State Inspector in the main editor. Or you could turn off the Inspector panel and dock the new Inspectors wherever you want.