Hi,
I find that toe-in reduces soundstage width quite a bit with
my Dynaudio's as well.This seems to be true for the DCM's I own also.
I didn't read all of the prior threads but I'm curious to know what's behind/at the sides of your seating position
I seem to get a bigger soundstage extension on one side of my listening room because it's an assymetrical layout.
Pillows behind my head seem to help reduce early reflections from the wall behind my seating position,which seems to help soundstage width and depth.
One last thing seems obvious but I'll mention it anyway.
Some recordings don't seem to have a lot of stage width-depth to begin with,others are truly incredible.Who knows? Good luck.