First of all, great praise for the completed questionnaire in the initial post, and even two-colored. Unfortunately, the plot and large parts of the dimensions are missing.
"Throw everything in the bin and start from scratch" is a good idea because it is always more beneficial to do a relaunch instead of a patchwork. Especially in the last but one and last percent of correcting an "almost perfect" floor plan, an amateur planner can excellently box themselves into a dead end. Presumably, exactly from this realization, this draft already arose, because the standard models lack the room "Child 3," which here would have been needed for conversion into the sports room.
You apparently still oriented yourself on the size frame of the Anstattvilla "extended Medium Size" (10.5 m edge length), thereby creating too high a packing density of rooms/wishes ./. floor area.
A copying error from the ground floor. [...] We initially concentrated on the interior floor plan.
The copying error "from the ground floor" already starts with deriving the upper floor from the ground floor at all – consult Aunt Google for explanation in "The upper floor takes precedence." What were the guiding principles of the design approach anyway?
We already had the issue with the lighting of the staircase on the upper floor / the overhang of its start once before, I can't find the spot right now, but to my recollection somewhere in a thread by
The word "standard floor plan" was also often mentioned. We have been looking among the "big ones" for a while but have not yet found THE floor plan that goes in the right direction. The sports room upstairs is basically nothing more than a third child's room. One only finds few comparable floor plans with three children's rooms and an office, where the orientation of the rooms also fits. Does anyone come to mind?
Perhaps a floor plan suggestion would also work that, in the manner of a wheelbase extension in stretch limousines, inserts two little meters, i.e., changes a 9 x 11 m base model to 9 x 13 m... Also look at one-and-a-half-story templates (also because square models dominate the Anstattvillen – but above all, because that is the logical systematic search path when you only "need one more room" on the upper floor).