What a great room! I completely agree with you on the new window treatments - I think they would change the whole look. Maybe no valance and an iron rod with even a neutral color, heavy linen drapes? If you're in the market for a new sofa too - Im thinking the same type linen look with new pillows?!

On the wall opposite the tv - do you have room for a long bench under the framed pictures? Could be a way to tie it all together?

I always think that fireplaces on an angle should be illegal, but in general the room is great! Newer drapes that without a valance would be good - fuller and not so dark.

I agree this is a 'perfect' room ! The photos are a bit dark but perhaps consider adding some textures or colored accessories / pillows.