There are many things unrealistic already, just having the airfields close like that to begin with. It is a simple optional solution to rectify a problem that appeared trying to solve another problem (the long flight times).
Limiting loadouts does not really stop the single engined fighters being able to access much better performance than they had in real life, because they will still be able to loiter and engage in fights with very low fuel amounts (with the performance that goes with it). The problem will become worse when airframes will be able to be damaged from excessive G-force for the given weight of the aircraft. Being able to fly at low fuel then = hugely beneficial, while at the same time bombers are penalized even more. Their fuel carrying/range ability being even more irellevant, while suffering from their weak airframes even with low fuel.
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