My condolences on the compromises you have had to make. With speaker placement as well as the TV.
I would go for the “dust cover”… make it absorbent. I use a very heavy tightly woven wool carpet behind my speakers (see my UserID). Makes a big difference as did getting the equipment racks out.
If I was confronted with this compromise, if I had a study or smaller room I would get room appropriate sized speakers and build my system with higher quality (but lower power) equipment. If carefully built the sound quality could far exceed a larger system in a compromised setting.