Paul, Your thesis is that tidal forcing significantly explains QBO statistics. The NOAA scientist's critique is that inherent equatorial planetary harmonics of ENSO are unrelated to tidal inputs. He challenges your model to make falsifiable predictions. There are intersections to these opposed views.

Tidal oscillations will tend to fluidize equatorial wave harmonics, increasing Q. Unfortunately, no control experiment is possible for comparison, of an equivalent Earth with no Moon, but a suitable model might show enhanced Q.

Weak tidal forcing, under sensitivity-to-initial-conditions, will occasionally create an amplified equatorial wave effects. Unfortunately, this will also be hard to prove, given data and computing limitations. At best you can prove that forcing must be >0, and calculate approximately how weak the effect is.