The fm was tested, and is still tested, by two former pilots, leaders and commanders of the Frecce Tricolori.
Also consider that the Frecce Tricolori Virtuali, to which I am honored to belong, do the acrobatic program of the real Frecce in the same times and with the same parameters.
Obviously the behavior of the airbrakes is important for the development of the aerobatic program and, although everything can be perfected, it represents a good simulation of the real one.