Adam, as any discussion of improving measurements and understanding is clearly not possible, might I suggest locking this thread
You mean, "Adam, since I've not shown the ability to understand lock this thread."
If something genuinely changes the sound reaching your ears, then it must change the signal going to whatever transducers are in use. You claim to hear this glare problem that defies available measurements, but don't want to entertain looking at this in some additional ways nor seem to entertain the possibility your experience of glare isn't related to sound instead of other influences. You've been entrenched in this without cooperating to see if there is anything to it. Forgive the rest of the audio world for not assuming what you hear is definitively a physical phenomenon of sound.
Have you made even one suggestion on how to measure or what might need measuring? If so I missed it. How can you complain about improving measurements when you nor anyone has suggested any such improvement.