First of all, again super review Erin, many thanks!
Funnily since yesterday I am experimenting with a 2,5 kHz BBC/presence dip per EQ on both my LS50 pairs (Anniversary and Meta) as I was analysing the in room responses of a Revel loudspeaker of a member here and till now I enjoyed it with many recordings, sweetening them like a
glutamate flavoring.
My theory for now is that most recordings are mixed and mastered with non concentric driver loudspeakers that show a dip in that region in their vertical radiation and sound power which they of course partially compensate during the production process.
If you or others want to test it you can try with one PEQ like 2,5 kHz, -3dB, Q=2.