It does not change that much. You will not see provinces defended by one single brigade very often in HoI3 either.
There's no way Switzerland wouldn't look weird if you annex it with France, Italy and Germany.PS: Switzerland should be different, because if you annex it with France, Italy and Germany, it looks weird.
Looks pretty impressive. Just wondering though how it will work with rivers - it looks like they flow through some provinces, as opposed to the 'only province border' system with the current map. How would that affect movement and combat modifiers?