Calibration correction and smoothing (1/24 octave - 1/3 octave, see Fuzzmeasure) would make FEAT useful for published microphone and speaker measurements, the primary reason I bought the software.
For design work, FEAT is fine. The data is accurate and useable. It just isn't what people outside the laboratory are used to seeing. For publication, I have to correct for my calibrated mic's response and perhaps other anomalies in a given test setup, and the "noise" at high frequencies needs smoothing since it is an artifact of the test chamber and differences in polar pattern between DUT and calibrated mic.
Another vote for this feature request.