I don’t think the draft is that bad either, the kitchen is reasonably planned for once, though without exact measurements it’s naturally a bit difficult to evaluate.
I would think twice about having the stairs so close to the kitchen and generally open to the living area, I think despite a good extractor hood, odors will easily travel upstairs as well as noise (putting away the morning dishes from the dishwasher could wake the kids or the partner who is still sleeping).
Is a study on the ground floor necessary with 2 empty rooms in the basement? I believe it’s especially better to work in the basement in summer or are the rooms planned for something else?
I feel the same about the relaxation corner.
I don’t think the house needs much more width.
The bedroom was mentioned, how does the one at the back get into bed? There’s a wall there.