Oh hey

[Tellis]

Not to mention it's very likely it will unfreeze once you catch Kyurem or beat the main antagonist or something, doing what they did with the eastern half of Unova in the original Black and White. So meh, it might make the northern and eastern towns slightly less as full as they were before (or not!), but it's not like they're getting rid of them outright.

Here's this little thing for seeing the differences between the game maps, if anyone cares to look! If you look closely you can catch hints of things beneath the ice that weren't there two years prior, so the unfreezing theory is probably pretty solid.