Well, you are quite a character. You come in post #45 quite casually as a cheerfully whistling Hans Guckindieluft with a big bombshell of information: that your property is enclosed by knot lines and alone forms the planning area MI3, above the plan for two properties probably a WA1 (and behind that at any rate a WA2) borders it, the back ten meters of your property lie outside the building boundary (so much for your dream of a pool), and on the neighbor to the left of the plan there is even a special building window Ga/Cp right up to your boundary. Then you can still see on your left side and on the neighbor 315/2 at the top of the plan a three-meter wide angle – the only thing missing is that there is a GFL right on it. When Katja says that hardly any consideration has been given here to the development plan, that is still phrased very politely up to the breaking point!
No, you can’t "still evaluate whether the windows make sense". How an architect can arbitrarily rotate a house and change the stairs is beyond me and seems like a perfect excuse to terminate his contract. Where did you even find him?
Daher die Frage: ist der aktuelle Grundriss wirklich Schrott? und wir müssen komplett neu starten mit einem neuen Architekten?
Besides the fact that after so many essential pieces of information dropped so extremely late I really have no desire to analytically deal with the floor plan: the architect is absolutely without question replaceable, and with a proper architect you should always start anew, that is, without dragging the "virus carrier old plan" into the work with him. At most, the draft from can – but only after his first preliminary draft! – be brought into the discussion with him. I don’t have an architect "on stock" yet in the HP circle, but I’m happy to look for one for you.