Personally, I wouldn't recommend that setup. I don't see the point in putting throw as a main button, nor should you be putting character trait on the least accessible of the six buttons normally used. Throw on the thumb's slot is wasting one of the most accessible fingers, plus it is a natural command with light + heavy anyway. It's far more convenient to have the default setup or this slight modification:
Light - Medium - Meter Burn - whatever
Heavy - Trait - Flip Stance - whatever
Light, medium, and heavy are in the spots where you can hit them at all times, and you can do 90% of the things you need with those three buttons alone. Meter Burn is mainly there for convenience and doing Supers with heavy + medium + Meter Burn. As a Green Arrow main, you'll want your trait accessible, so I'd keep it within the five button placements I mentioned (3rd button on the bottom row is the least accessible button).
Flip stance would mainly be for throw teching with it, not much purpose for that button outside of Super's shortcut but then again there's not much purpose for Interactable or Throw with the manual commands either.