Do you own or is this a rental? The pix look a little stretched like realty ones. Since there is a rad between the doors, forget putting TV there. I'd keep the dining close to the kitchen and put the sitting/TV area to focus on the long wall. Start with the fun project of finding a knockout chandelier to hang from that pretty ceiling. Is there a fridge under the microwave? I see only one wall outlet behind the door and one above the counter, so you'll have to use extension cords and cord covers along the baseboards to have enough lighting here. Consider floating your sofa facing the long wall and TV. Then use a drop leaf table behind it for dining. You'll be able to open it all the way for entertaining. Anchor your seating area with a rug 2-3 feet wider than your sofa.

Cute place, i see the challenge, but I am really against a sectional in this space let alone for guest to have to sit next to each other it creates a weird dynamic. I hope you are not planning to put the tv over the fireplace that would also be a neck breaker. I see the couch on the side the two red chairs. the tv on the wall with the lockers and 2 chairs to the dining room side.

Really like @Nancy Ingram's suggestion - the “chaise lounge to enjoy the view” is really great. @Lou Pimentel We mocked your room to dimensions but for some minor simplifications. Here are some initial thoughts. In the following layout (styled Boho-Glam just for example), the two chairs in the main seating area can both be rotated back to face the windows and the fabulous view. A divider could mount your TV, and create privacy for the dining space. The great view can also be enjoyed from the dining space. There is also a separate conversation space that we feel does justice to your room’s diagonal corner space. As one enters the room, the eye-line is guided towards the kitchen back wall with storage and some decor. This wall could be highlighted more as well, but in the overall look, we feel better this way. We are working on another layout that some of us like better than the above, so stay tuned.

I agree with the architect the living should be next to the kitchen as conceived, with a dynamic ceiling and views. Wet bar does not mean you have to leave everything out on a long counter. You can section off a work counter/ice/ref on the stair end and the remainder can be storage cabinets under the tv. Recess the Master door in line with the tv wall (may require flipping the bath/closet, have to address). Ditch the powder room, SF is just too scarce. The pantry I'm torn on, they eat up space, but with a moved wet bar area and Dining in front it may be acceptable to have it breaking up the view and connection to the kitchen.