You have some good ideas but if you're going to sell soon and aren't planning on taking the soffit out, I would just do some minor changes and keep the cabinets (just add a couple cabinets). I wouldn't move the sink but just get a nice stainless steel sink and update faucet. I'd get a stainless stove vent. Remove the wall on the left of the refrigerator but then just do a small pull out pantry on the right of the refrigerator. And, put a cabinet above the refrigerator and make it look built in. A glass backsplash, can lights on the ceiling and pendants above the penninsula. I think a raised counter will make the kitchen/room feel smaller.

The floor and cabinets almost look like the same color. I would lighten the cabinet color - making sure it doesn't clash with the floor color. I would also modernize the open cabinet above the microwave by removing the moulding, or adding a door. I'd find an inexpensive countertop that pops against the wood (or painted) wood cabinets. Change out the cabinet glass to clear, and do a new backsplash that brings it all together. And, finally add a cool light fixture, and maybe a kitchen rug.

It's definitely more centered than mine is! My house was built in 1945 when stoves were a lot bigger and that's why my range hood is bigger than my electric stove. Anyway, when you put up your floating shelves, you can either make the left size longer and the right side shorter. It will work that way unless you want symmetry. Then, I would suggest you make the shelves the same size and put them up in the same position on both sides of the range hood, just like a mirror image.

Which would look better tiles or glass and what colour? Would it be best to cover the whole wall, half wall under the range hood or just between the range hood and cooker?