Cool result. It's hard to quantify or describe the audible subtleties you are describing. We can all relate that when it sounds great Mr Burns kicks in.
"I'd trade it all for a little more!"
I know your setup is in a large open room. If you are interested, you can improve things further by placing gobo panels on either side of your loudspeakers. This can simulate symmetrical boundaries -really important for channel balance and proper stereo imaging. Even better would be QRD diffusers instead for your wide dispersion Axioms.
Try it with couch cushions or draping fabric over chairs backing against the speakers at sides. Kinda neat how you can manipulate sound this way.
