Forgive me, author, but this creation is just a mindless hack-and-slash.

Could you please explain what exactly you mean by that? As for the size, I'll think about it. I had a feeling that when a map of this size is fully completed (with all the graphical effects), it might lag even on powerful PCs. And I know about the copying. The map was divided into equal sectors precisely for this purpose. Because if a sector that is presented for testing proves itself, then the entire sector will be copied and transferred (if the computer doesn't die from it) to other starting locations with a slight modification.