This one is a simple suggestion but probably much more complicated to program.  When we use the rearm pad, I would like to see a reload option appear on the screen.  The options would be this - reload same or change fuel level/weapons load out.  This option would be true to history and add realism.  Usally the mission, targets and hostility level change from the time that a pilot takes off to the time that he arrives back to rearm/refuel.