If not for the multplier you would just have hordes of La-7's and Spit XVI's flying over the same CAP'ed base endlessly vulching. Is that "realistic"?
Well fast, light, highly manouverable aircraft optimised for low and medium alt performance with moderate endurance and a reasonable gun package would seem ideal for the job!
These aircraft are the best choice and therefore the most "realistic".
Unlike heavier long range multi functional aircraft designed to carry significant ordinance and or fuel stores optimised for higher alts.
FBM2 is a game play modifier................ on balance a sensible one IMO, but to argue that it enhances realism is a falsehood. It adjusts gameplay balance to bring more aircraft into effective play.
or is the question..............Is vulching realistic?
Vulch tendancy has nothing to do with FBM2.
and vulching is very realistic...........what is unrealistic is the tendancy for a pilot to repeatedly attempt to take off whilst having a large number of enemy fighters over his field.
You can be sure that during the many LW raids on VVS fields around Leningrad that the LW "vulched" if given the opportunity.
Further if pilots continued to attempt to launch and a pattern of no counter attack from neighbouring fields was common practice then those LW pilots would have hung around to enjoy the feast if AA suppression permitted.
Same was true on the Crimea peninsular and was true in the reverse as the LW was pushed back in 44/45 thru Courland and Prussia.
Same was true over Belgium and Holland and Germany in late 44/early 45
Indeed in 45 the majority of LW Me262's taken out of action due to enemy fire were to "Vulching" activities over LW airfields by Allied aircraft.