A field where we could enter the ZFW (Zero Fuel Weight) of the Aircraft instead of fiddling around with the Fuel Slider and adjusting certain weight values until the ZFW the Aircraft in the Sim equals to the ZFW a flight planner is issuing would be very handy feature and easy to implement.
If this is the promised next gen Simulator for the next couple of years then the Options regarding Weight and Balance should smarter than twenty years ago.