I would suggest you take out the cabinet that is to the right of the stove and use it elsewhere in the house -- perhaps in the bathroom or dining room with a hutch above it. Then, I would suggest you have someone install a lazy susan cabinet in the corner between the sink counter and the stove, meaning you would move the stove down a bit and have a small cabinet/counter top to the right of the stove. I would suggest you have the cabinets refinished in white and then paint the walls a pastel you like. If you would prefer white walls, then add white-painted crown molding and paint the ceiling a light neutral blue, such as Sherwin Williams Niagara Falls Blue. Then, I would suggest you choose a favorite accent color and use this sparingly in accessories like towels, pot holders, small vases or floral arrangements, and a valence above the triple windows. For a genuine 1940s look, you might have white ceramic square tiles with a rectangular red border installed as a back splash behind and above the stove. If you are replacing counter tops, I would suggest a light color such as white with a beige or light grey vein or striation for some sort of pattern. You might be able to find the same color and design in floor tile OR opt for a wood floor as another poster suggested.

The door into ensuite currently opens in (hinged on left). Im thinking we will need to use a cavity slider door (which means shifting the bedroom light switches!) This project is growing!

I recommend having the TV in a separate well-insulated room if you're having a great room/open floor plan. We combined a play room/media room and put french doors on so TV is visible from great room/kitchen, but noise is contained. Also, love having hand-scraped distressed wood floors that have withstood our kids and dog. Quartz counters have been proven crayon/paint/marker/anything-resistant. A mudroom with cabinets helps contain backpacks and coats by entry (ours is by garage entry since that's how we get in the house). Maximize built- in storage in every room--it's nice to have the option to store away all the toys/school projects/art supplies where they're used and played with. Consequently, we also put in a walk in pantry to store packaged foods and craft supplies. Can keep going, but these are good to start with. Goodluck!

A very simple layout keeping the floor space within the kitchen, the WIP takes up a lot of space with not much gain, The broom cupboard could be moved to the Laundry/entrance, narrow. If the wall has been bumped out to the eaves on the deck side giving an extra 300 depth to the kitchen you could make the island 2700 x 1200 and all drawers. The wall of narrow pantry will hold all pantry needs and more, no deep cupboards to dig into. cheers