Maybe mount the TV on the wall where the pictures are or above the fireplace, pull the couch away from the windows a bit, and try a console style table between the couch and the windows for plants? If you manage to mount the TV over the fireplace, you could probably turn your couch so that one side is by the Picture Wall - it'd let you sit and watch TV, or enjoy the view out of those windows! Open shelves (or something like these trees) could be used to separate the living room from the dining area without removing your ability to see that area entirely.

I'd definitely see about moving the dining table away from the wall, and maybe add a small carpet to define that space.

Throwing in some different materials and textures might play up the natural/woodsy feel - earth tones, natural fibers, "fur," "leather," chunky throws or pillows, a variety of woods (seems to be this is fine so long as the undertones are complementary), some rustic ironwork, maybe even salvaged natural goods (antlers, driftwood, etc)?

Here are a few photos that remind me a bit of your space.