Personally I find the LCR approach problematic with the orchestral music, because the orchestra is not really a singer/background/drums thing. So many musical moments of equal importance could come from so many different spatial positions. For example, the main theme could be played by the 1st violins, and then by violas, and cellos, and then whatever else the composer came up with. In the "even" panorama this would sound natural, but if one of the sections is in center, it will sound more prominent and "important" than when played by the ones panned, and that might well be quite unintended by the composer.
Well, not to mention the sitting on the conductor's shoulders sound picture, which is pretty hard to avoid :)
I thought I'd rant a bit more about the mix following the composer's ideas and reinforcing them, etc., and how Mahler's (for example) positioning can't be changed too much, but then I thought you know about that, so ... off the soapbox :)