@Patricia, you have a good point. I think I will definitely want to consult a designer to get their perspective from an aesthetics/space usage mindset. I do have a large media room in the lower level where my big screen is, so I figure if I ever have a large group to watch a game, etc., that is likely where I will need the most seating. The upstairs could then be used more generally for entertaining. My dining table seats 10 and moving it into living area would allow me to add chairs on either end. The addition of a 9-10’ Island would add seating as well. At worst, the family in its current footprint could snugly fit a ~6-7 person sectional and a chair. I think with an additional ~2-3’ feet in length and width, I should easily be able to fit a sectional in there as well as 1-2 accent chairs. Plus if I’m entertaining there would be plenty of space to gather at the end of the kitchen where the new bar would be. These pictures are not by any means exactly what I would do (I used a trial version and stock colors/cabinets), but should help give a sense of layout.

If you want useful -- I highly recommend a small table with two chairs in the one end. Also, bookcases with glass fronts, or, like I did -- one bookcase and one secretary that closes up to hide the paper and computer monitor. I use my 36" square table for so many purposes -- morning coffee, afternoon tea with a friend, making jewelry, drawing, computer, solving jigsaws. Mine has two leaves that pull out, so I can also bring chairs in from the dining room if I want to have four people in the space. My space isn't crowded. There's at least 4' of space between my table and the rug. You're fortunate to have fewer doors and windows, and a 15' width. My 1939 living room is 12' x 21', so it's divided into three spaces instead of two. My secretary and bookcase had to be on the other end of the room.

Here is the relative size of your TV on that wall. I had to estimate the width of the door (and I suspect I may have made it narrower than it really is; you'll need to measure it open), but the TV is to scale as you can see by the yardsticks I taped up.

Bumping, but for me, I would do 2 shades. That way each "section" will be even and look more deliberate...the shades will be what people see and I would want 2 the same rather than 3 that are 2 different sizes...