The outside looks blown out.Maybe because no textures yet?
The floor looks dirty.Maybe a spec layer to look less perfect?
The light that shines on the floor at the bottom of the chaise isn't shining on the chaise.
The tree outside doesn't appear to be getting any light source.
The wall behind the couch is way blown out for the light source.
It's looking good overall it's just that I hope you aren't going to rely on just the sunlight/distant light for the only light source.
Looking forward to updates as you go along.