I have an Audible Illusions L2 tube pre now. You are correct. The Revels are more natural. They do everything. I guess I'm looking for high end that is not strident but detailed and midrange that is sort of polite and doesn't hurt when you turn it up. My cousins B&W 802D2 has a midrange and high end I like. I have tried so many speakers. KEF LS50, Tannoy XT8F and XT6F, Spatial M3, Golden Ear Triton 2, Dynaudio Contour S3.4, Totem Hawk, Gallo 3.5. Frustrating.
And this, in a nutshell, is what I consider the "high end sound" which JA has promoted. As the OP has put it, it is not natural, but has "extra detail." I call it ragged frequency response with emphasis on a couple of bands at the sacrifice of others.
I make no value judgement here, but I am saying we need to be more aware, like the OP is, that it's far from natural, and if JA would stop calling it that, I'd be happier.
Best,
E