quite accurate indicator, also from my point of view, regarding our beloved unofficial recordings which are never going to be "perfect" or, in absolute terms, they are to be considered "poor" recordings due to the way they are actually made (from the audience, with all the related problems)... so if you can hear all the instruments and voices and the timbre is also reasonably well balanced it's just a remarkable achievement.
but, as far as official/professionally-made recordings (where the correct timbre and the ability of hearing all the instruments and voices is just obvious) , it's a dozen years now that my main indicator isn't exactly the timbre balance of a recording (which is still very important, though, together with the dynamics) but, rather, it's the depth/witdth/height of the soundstage (which we could also sort of call "raw resolution"), and that also depends on the gear your are playing a recording, and which is an indicator of how the low level details are carefully preserved and delivered to the listener.