I don't like the idea to rename the app. We choose the name for a reason.

The name of the app is for developers, but the URL for the user. The URL /core/version/ does not say (from a user perspective) what you can find behind it. And you wouldn't guess the URL neither. Can you give some examples which URLs could be under this namespace? I can not think about one, because any other functionality is part of another app.

Another way would be to use the global namespace (r'^', ....) But in this case we have to think about every name in this namespace.