Sinnoh was a large mixture of water, Grass, Mountian, topped with a little bit of Snow on the top.
Kalos IS the most diverse, more diverse than any region before. Its going to have very similar quirks to older regions as is tradition, but it has the most Biomes that I can see on the map.
I do wonder why Kalos Region is star shaped though. Looks as if its going to force us through one main path just like Unova did.
France is sort of Star shape. Also the map like many others seems to lack some routes. I beleive we'll be going back forth and have intersecting routes like in Hoenn and Sinnoh rather than Unova's rather liner map...at least I hope so.