frogman,
Good points for discussion on several levels. As musicians, we strive to blend our sounds and play together. For orchestral playing, a 1st violin section in a large orchestra has 16 violinists who are told by the conductor to suppress individuality and play as 1 violinist. However in small chamber groups, there is a single player on each part, so the quirky individuality can be heard. In a string quartet, sometimes the viola and cello are in exact unison, so they try to blend and play as 1 instrument. But the viola and cello have different tonal character even when playing the same note. It is more interesting to hear the tonal differences so that even though the same note is being played, there is more color from the overlay of differences on top of the sameness. One of my favorite old string quartets, the Budapest, had two violinists who had very different sounds and temperaments. The 1st violinist, Joseph Roisman, had a dark, sensitive, introverted sound and personality. The 2nd violinist, Alexander Schneider, had a more forward sound and extroverted personality and playing style. Schneider told a story of how an audience member said the quartet was marvelous because they sounded like 1 instrument. But Schneider thought if that was true, it was a lousy concert. He wanted good ensemble, but with a recognition of the differences, with each of the four players contributing his own individuality. I agree with the Schneider view, although there are plenty of quartet groups that strive for more blended ensemble and less individuality.
For orchestral music, each composer seems to have their tonal signature to produce a unique timbre when 2 very different instruments are playing unison. Flute combines well with violin in their similar freq range. Bassoon may combine with French horn for that unique timbre. I can recognize the identity of a composer by the timbre of the combination, even if I don't quickly name the particular piece. So how does the audience listener appreciate the spectrum of separateness vs total blending? For a distant listener, the blending predominates. For a close listener, there is more separateness. If the musicians are skillful, they blend well no matter how far away the listener is.
Analogy with food. You can have 3 types of food on the same plate in separate locations, each carefully flavored. Alternatively, you can mix them and make a tasty soup. Both are enjoyable experiences, but it is unlikely that the mixture, well homogenized, would be as tasty as the separate foods. Steak and salad don't mix well, but separately each would be delicious.
The wine connoisseur enjoys the total blended taste, but he goes further and tastes the various flavors as they may appear at different times during the savory tasting. He wants to separate the flavors and in that way get more appreciation of the fine character of the wine. Years ago, I tried a liqeur blend called "43." It was said that there were 43 individual components, but I could only perceive a few. A more trained connoisseur could taste many more than I could, and I will say he could get more out of that tasting than I.
All this is my roundabout way of saying that the more distant hall sound is more blended and homogenized, and the closer seat still has some blend but more detailed colors and distinct individuality. Someone may like the blended, homogenized sound, but it is NOT more detailed. Rather, the details of the differences are like homogenized soup, much less identifiable. Distant sound is the product of acoustical multipath bouncing around of various instruments in the journey from the stage to the distant location. These are the laws of physics, like it or not. Blending yields less information. The conductor on the podium has it all--good blending with the maximum detail and appreciation of all the instruments.