I think I would swap the smaller sofa and put it n the tv room and put the larger one centered, floating in front of the fireplace. I'm not usually a fan, but since your window is off center, I'd try putting the small sofa at and angle, right of the window and face it to a tv in the opposite corner. For the bay window in the formal space, I think it would be a great spot to put your barrel chairs with a 36" round table height side table. What a wonderful place to have morning coffee, read a magazine, play a game of chess, etc or even maybe do a small puzzle. Like this arrangement, but a small round, game size type table.

Like Julie Anne, I would use a round table with 4 chairs over by the sliding door. If it expands to oval shaped with 6 chairs, even better! However, I wouldn't do a second table under the chandelier. Instead I would have that chandie replaced with a flush mount fixture and add a chandelier over the dining table. Then I would put a sofa facing the fireplace. The tv can go in the nook to the right if your tv is small enough, or over the fireplace if it is larger. In either scenario I like the idea of shelves in that nook. Put a pair of chairs in front of each window. The ones to the left of the fireplace can share a round table between them. I wouldn't use bar stools, personally. They are hard to slide in and out on carpet and they will restrict your furniture placing options. Instead I would tuck a bookshelf into that spot (because I always need more book storage!) Or just ignore it entirely; when you have guests they will enjoy leaning in the counter just as much as they will enjoy sitting on stools, if not more.

The issue will be the size/bulk of your sectional. For a smaller footprint with the look/feel of a sectional, consider a reversible chaise sofa. It gives the option of a right or left chaise so you can change your arrangement at will. You can try it both ways - at the wall or at the tile, and you can change it up seasonally if you want. I think the TV wall is pretty well set in stone. Be sure you put yours at the right height for viewing.

It looks like it's worth making it work just for those gorgeous views! It appears that you could place a table by the kitchen, turned in the opposite direction as is shown on the drawing, to give you extra living space. You could place your sofa on the main wall as shown, with the tv on the wall by the shelves. Or possibly float the sofa in the room with it's back to the entrance, keeping a walkway behind it, with your tv and console on the main wall. Or use the sofa in front of the slider with a walkway behind for access so it is facing the table area, with the tv on the main wall. It depends on the exact dimensions of your furniture, and the direction of your L shape. But I think you have good options. The finishes are light and neutral, so you can decorate with any colors you choose, or already have.