But isn't it strange to have two tables so close together?
Yes, in my opinion it is. When there are two tables, in everyday life (so every day except birthday / baptism / Christmas / Easter) one is used for eating and the other as a storage surface, the latter of which doesn’t necessarily look nice, but rather messy. Better a well usable, adaptable (extendable) table.
One more little thought: "big" does not necessarily mean "inviting," "functional," "harmonious," or "beautiful," as one would wish the heart of the house to be.
Fundamental floor plan changes in renovation projects are anything but trivial; perhaps it would really be a wise idea to go to an architect with your requirements, your wishes, your ideas but without your drawn plan.