I once tried to visualize both variants (kitchen in the south or as originally planned).
Of course, there are pros and cons in both cases. The following come to mind:
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Kitchen upstairs, as originally planned:
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+ 2 doors (living room and kitchen) possible from the hallway. Thus, more light in the probably rather dark hallway (through e.g. glass doors/sliding door)
+ Kitchen not so prominent
+ Door from kitchen to outside (east side) possible (herb bed and possibly a little bench for a coffee)
+ Tiles are easily doable (between wall unit and peninsula)
- longer way from kitchen to terrace
- living room in the south
- couch position visually reduces the room
- TV very prominent
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Kitchen in the south:
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+ Kitchen island possible
+ Living room area more separated
+ Direct terrace/garden access from kitchen
+ Another door in the south possible, thus more light
+ TV not so prominent
- Kitchen very prominent
- Tiling in the kitchen area a bit more difficult (only between wall unit and island would probably be the only option, but we are not sure if that would look good)
Best regards & have a nice Sunday!