I like your setup as the HT room I am going to have is 11x14. So at least this gives me some idea of my layout.
Love those seats TOO!!. They look comfy, can you easily fall asleep on them?
Overall, you digging the sound in this room? It does not seem to excessive? Any other further plans or wish you could have done different?
I don't personally feel that it's excessive., Because of the size, the effective output from the sub is very high, and can be quite punishing, but, that's why they have gain knobs on them!
I would, of course, wish I could fit more people than just 2 in there, but that's the space I have, so not much could be done about that, overall quite happy with it.
As far as plans, same as everyone, I guess, get a larger display. Would like a 65", but I've been dumping so much money into building my 2 old cafe bikes, that a new tv will have to wait til those are done.