Taking a look at that virtual system leads me to think that even though there is a large screen TV between the speakers and windows behind the listener and one to the side, this is pretty much a standard room, give or take, that one must deal with and to make the best of. Every listeners room is different and actually no better unless one can afford a dedicated room, optimized for listening.
From my own experience, I realized the differences in fuses without addressing the large screen TV between my speakers, not to mention having no treatment behind me (save for a large sectional where I sit and a bare wall with no treatment) and a whole wall of windows to my immediate right so there is something else at play here.
Yes, addressing reflections would help any system but I don't see how they would conflict or overshadow the results of changing fuses as the results were of a different nature, and magnitude, at least for me.
All the best,
Nonoise