While I was using GSX today, I was looking at the Shell Fuel Bowser and the traffic cones on the front bumper of the truck.
I was just thinking it would be another nice subtle addition to the GSX experience if these cones could actually be placed around the perimeter of the aircraft.
It would make the Ramp look a tad more " Realistic " IMHO.
Aerosoft's Airbus X gives the user an Option in the MCDU to place Traffic cones around the a/c. But this is just an " On / Off Feature.
Maybe this could be modelled in GSX and customizable through the GSX Customisation feature. IE The Cone's radius etc.
Also maybe an optional " Safety Rope " placeable around the a/c when refuelling would be a nice update.
Maybe GSX could look like this one day.
http://upload.wikimedia.org/wikipedia/commons/a/a7/Ryanair_Boeing_737_refueling.jpg