@holmz Ahhhh. Haven’t joined Audiogon and bukake in quite some time. Thanks for the reminder.
So - the culprit was my wingback! The two wings and its low seating profile managed to smear the sound. On the advice from @elliottbnewcombjr I temporarily replaced the wingback with a straightback that also seated higher and it made all the difference -- sounstage opened up; instrumentation much more 3D than before.
Which sucks as my wingback is really comfortable! I put four sections of 2x4 beneath each leg to get equal with the tweeters, but that helped only so much.
Still, this will be a cheaper solution than almost any audio addition I can think of!
I would love to see a visual map of the soundwaves and how the wingback blocked or did something else to them.