i agree, it would also add to the scenery a lot and you would have a nice walk and see how the vegetation gets richer the closer you get to gridania. From Gridania to coertas there could also be something like a way, that takes you up the mountains, rather then just "ding", <welcome> to the mountains.
The animals also should reflect the vegetation more (this bothers me even more tbh). The same mobs all over again. That is retarded. Each area should be unique in most aspects, matching vegetation to the creatures therein would be nice.