I get great soundstaging with my speakers on the long wall and my listing position near the rear wall. Almost as good as shortwall placement in my room but with much better bass response. My room is well treated though.
I think the comments about removing the TV are good. You need to figure out what each piece of room set up contributes to the sound. It is possible that with the TV completely removed doesn't make that much of a difference.
Do you have the speaker cable length to try the speakers way out into the room? Just to see if you can get any depth. There are some set up that just don't do depth well.
It takes a long time and effort to get a handle on room acoustics.
Seriously, you should write up some plans for those diffusors I would love to build a set. Really non recording studio look.
I think the comments about removing the TV are good. You need to figure out what each piece of room set up contributes to the sound. It is possible that with the TV completely removed doesn't make that much of a difference.
Do you have the speaker cable length to try the speakers way out into the room? Just to see if you can get any depth. There are some set up that just don't do depth well.
It takes a long time and effort to get a handle on room acoustics.
Seriously, you should write up some plans for those diffusors I would love to build a set. Really non recording studio look.