I still find the style of the building facade appealing. If you like it, don't let anyone deter you. It has to please you. I also like the children's/bedrooms facing south, but shading must be considered here. Possibly think about cooling using [BKA]?
You have an architect after all. Discuss your concerns and wishes with him, then he will also plan YOUR house for you. Ideally, he is not only a visionary but also ensures that the house works for 5 people.
I still view the small children's bathroom, the small hallway on the ground floor, and the kitchen area as critical; it could get tight there. But all of that can be resolved without planning a completely different house.
Congratulations on the great plot of land