I hope you're up for crit on the layout mate? I've played with just your lower floor.
You seem to have a LOT of circulation space that is going to waste, whilst the "use" of areas aren't defined. In this case I've pulled the fridge to a cabinet formed by extending the entry division and introduced a cupboard to face the entry.
I've assumed a dwarf wall dividing the kitchen and lounging area so the sofa can back to this. And utilised the space that you had for the lounge as the dining. I didn't really like your idea of mounting the TV as you then expose the rear of it.
I haven't played with upstairs, though my thoughts are that it can work as a "for two people" rather than "maybe for two people". Let us see how you might approach that again.
BTW the acoustic style ceiling tiles for me have a very corporate feel, maybe you could soften this with plywood.