I think it’s a very attractive house and I like that the wall and floor have sentimental meaning. I’m with him on not wanting to paint it to look like every other trendy white wood wall out there. In fact, I don’t think there’s too much of a wood look at all ... plenty of white everywhere else. And it fits in perfectly with being a lake house.
Yes on a rug in the living area. I think a woven rug (with a border in a complimentary color) would look nice under the dining table, too.
I like your idea of a sofa table. Beyond that, it’s hard to say without knowing what the new furniture is going to look like in there.
I guess I’m just not seeing any problems with the rooms, I think they look fine, and will look even better with some added decor. :)
Q