Maan I have to get stoned to find your solution indeed! It seems to me to rectify problem you might want to wear blindfold while listening and see if it really helps. I've seen some night clubs place speakers diagonally around the dancing floor which is kinda another hint for you to practice some dancing of the 70's era while spinning some tunes...
Diagonal seating?
Our room is configured such that the listening position has to be on a diagonal in relationship to the speakers. I try to turn my head so my ears are square to the speakers, but often I am listening while I’m doing something that needs my attention centered. It’s difficult for me to ascertain how much this affects the sound. I have noticed the soundstage is uneven unless I do something to compensate. I don’t know whether this is because of variable hearing from one ear to other since I am now 70 years old or it has something to do with the diagonal configuration.
Any thoughts?