It ruins the scaling for the pokemon world to just be another Earth. It treats France like it's the size of New York city or about an 8th of Japan. There's no amount of line smidging or relative spacing that can fix that, even if Kalos is twice as big as the next biggest region.
It's actually much bigger in the anime. Unless you want a Pokemon game that functions like Daggerfall (which is about the size of the UK in game area), then of course the regions are going to appear small.
4e is not D&D, but WoW making a Disguise check. Pokemon Black Friend Code: 0605-2800-9952; Trainer Name: Solace; First Pokemon (roleplaying): Shiny Umbreon