I think it looks good. I specifically like that sight line from the front door to the back garden is uninterrupted and having the door to the laundry close to the bottom of the stairs is more practical than having the door in the kitchen.
Make sure you have 3.2m or more between the breakfast bar and wall to ensure there is enough room for the dining table, the stools and a safe walkway through to the living area. If there is less you might consider a 90cm deep dining table and bench seating against the wall to help keep the dining area slimmer.
You might also want to consider if you would ever extend upstairs above this living room extension or into the loft. If the answer is yes then perhaps the stairs might be better swapped with the wc position to better allow an upstairs plan.
Q