Morning , now things are really moving -
I would also find it absolutely important to draw in the furniture, because that can change a lot. Since you want to place, for example, 8 running meters plus x of a wall unit or have a certain TV distance due to size, etc., and the size of the dining table, etc., this is indispensable.
I also find the hallway with 18 sqm way too big, unless you have something specific planned with it that should be recognizable on the plan; otherwise, I would find the space wasted.
In my opinion, sliding doors are also mostly a last resort and I find them rather impractical to handle; moreover, they usually do not close like a regular door.
The bathroom has again two doors, which for me is a no-go and I also see no sense in reaching the utility room from there and from there further into the hallway. Therefore, I would add a shower to the guest WC at the front (for guests and similar riffraff) and would want to consider my sleeping area as absolutely private.
If you wanted the utility room near the bathroom out of habit, you should also perhaps consider having the utility room closer to the kitchen. What I don’t understand is how the staircase in the utility room is supposed to work, also on the upper floor, because it is also "in" the room there. I think that another staircase might fit better; you still have enough hallway space.
Your open plan room is more like a corridor (which is deliberate in my case), so the prior furnishing is absolutely necessary. There are absolutely no windows there, as it is now it will look very dark and elongated.
Currently, I miss light there and above all a really large window front on the "nice" side of the house or the orientation of the floor plan towards such a side.