@ahuvia The conductor has the best seat in the house standing 6-7’ above the musicians inside the string section. The high priced seats are mid-hall center where a blend is achieved. My favorite seat is front row center which is as close to being on stage as possible. I love the instrumental separation from that perspective.
Since you are asking about large groups, I assume you have a good collection of symphonic recordings, hopefully from all stereophonic eras, 1960 to the present. Is your system resolving enough to parse out the engineering of each recording? You should be able to hear how close the mikes are to the group by hall reverberations and instrumental separation, and whether there was spot mikeing and mixing board shenanigans. Early stereo often was not natural. Today anything goes.
One of the most revealing recordings I have recently encountered is the SACD of the Cleveland Orchestra playing Schnittke Piano Concerto. It is a live performance with the mikes directly over the group. The separation is uncanny. Hopefully you are not afraid of contemporary music. The piece is a blast!
If you cannot hear these differences, then address your room and system. Don’t forget to do ALL the TWEAKS>