According to your suggestion the plane then needs to be fixed to refuel faster not the airstrip.(similar as the transport ship thread suggestions where they want higher level transport ships to embark/disembark faster but you need an upgraded Port for that not an upgraded ship)
I understand what you saying about planes flying short distance but still needs to refuel for half an hour.
What you asking is that airstrips should not have levels but refuel with time according to distances?
)