Running with your second floor plan (and ignore the glass sliding doors in this image) but would you consider changing your 3m narrow splash to a full sized fixed window on half the side and the remaining side create as the cooking area with cupboards, oven etc.? You mentioned you have stacker doors in the direction of the lounge, but in terms of space, from these doors, it's living area no windows at a room length of around 7m, followed by 4m kitchen room length including a 3m narrow glass splash to provide natural light for the kitchen area (cupboards noted above)? From your drawings there seems to be no windows on the opposite wall, is that right? I feel you will need to bring additional natural light into the kitchen area possibly bigger than the 3m glass panels if only 0.6m tall (or similar) especially with cupboards on top. If you're not keen on swapping out the narrow splash here's another example with your second floor plan (and also ignore glass sliding doors in this image) but possibly a tall window or fixed glass panel before your kitchen bench starts - even if <1m wide. Or greater than 1m if you're OK to encroach on your 3m glass splash and make it shorter. If the island bench is not a "must" you could create similar to this image and have a L-shape bench so it encloses the kitchen a bit more. This will help create the next room of your house ie. Kitchen - and you'll gain a few more cupboards if you're really wanting additional. Then have the big fixed window adjoining the L-shape next to the seating bench. You could still have your narrow glass splash with cupboards above, possibly just shorter (only referencing the L-shape and large door in this image - imagine fixed glass full-size wall panel in lieu of door next to the seats. Ignore the remainder of the kitchen). Is this an existing dwelling or new home build? For either of your options, are you impacting your roof-line as your first floor plan suggests you're widening the kitchen by 1m? The first plan I'm guessing will cost more; light wells and extra bricks vs straight wall. As mentioned by the other posts, there's plenty of storage options. You still have a decent amount of room for cupboards including a full-sized pantry next to your fridge space. I also agree with jbantick's of balancing space indoors and out (not knowing surroundings).

Make the most of the era and the exposed bricks. Put in a large skylight and fit wall garden system to "green up" those bricks and larger pots on the base. The brick base is perfect to hide the drainage system you'll need. Get a steel fabricator to weld up a drip tray to fit inside. Mesh over the top covered in your choice of pebbles or a sheet of CoreTen rusty steel laser cut to a design of your choice. Some Balinese statues maybe. Year round herbs.

Absolutely incredible! Stunning transformation :) your clients must question if they’re in the right house lol ;) really beautiful.

my sister had to originally put her washer dryer at one end of the kitchen, european style. She actually found it way more convenient, and so when she got to upgrade and do over the kitchen, one end of the galley became the butlers pantry with washer and dryer in there as well. maybe it could work, but given all the advice above, I think avoiding moving walls is going to be important. Gosh, hopefully everyone's advice helps! Don't worry and take your time, I have been in my old house a year and I think i came up with 4 different floor plans before i realised what I needed to do. keep thinking it over and one day it will just hit you what needs to be done.