I wanted to ask how much experimenting you did with your Sabrina's location. It doesn't appear you have them toed in as they advise. I have had Sophia for several years and recently bought some Yvettes. I haven't ever had a dealer out to my home but have read through the WASP and talked to several dealers and Wilson directly about the importance of their positioning. The easy takeaway from Wilson is that when you are in the listening position you should just see the inner sides of each speaker. For me, that really does make the soundstage come together to have more focus of the voices and instruments. I am listening to the UD1S of Mingus Ah Um and things are coming from far outside each speaker as well. Mine are on hardwood so it makes it easy to slide in small increments. On carpet it will take more time and you may need to get some furniture sliders like they recommend.
Did you have Wilson before these?