That's interesting. Though i do find the presentation just a tad brighter than I'd like, I don't hear a shrill, harsh, unreal sound to the brass for example. The horns have a bit of bite. . .but horns do in "reality" as well. And these sound similar to the sound of instruments on 78s that I hear on my father's 78s in playback. I think that we should be grateful for the sparing use of noise reduction here, and we're really getting to hear a lot more of the sound of the recording than we have in some instances in the past.
I know a lot of these sonic things can be system and even "ear" related. I'm quite happy with the sound of this set, and prefer it to earlier cd versions I have of this material for detail and dynamics. But I can truly understand if someone else hears it differently, as I find I sometimes hear things differently than others.