Looking for wider soundstage

I would try draping a light plastic painters sheet/tarp over the sofa to the left and also over the HT speaker to the right (maybe both of the HT speakers).

Both the sofa and the drivers in the HT speakers are absorbing sound.

DeKay

Open baffle speakers provide the greatest soundstage. Simple is best. 

@backdoor , I had a look at your pictures and I hate to bring you bad news but even with digital signal processing you are never going to get a decent image with your system as it is set up. It breaks almost every tenant you can imagine. It is fine for everyone's background music pleasure but that is about it. Your system needs a home that is more in keeping with it's intent. No amount of room treatment and expense is going to change this. Your next mission is to find a more appropriate home for it either in your house or eventually another if it is that important to you. 

dekay I’ll give that a shot. 
 

mijostyn that is bad news. 

mamba like spatial audio for example?