We have a fairly large app (50+ routes) where we have added a App.Route to encapsulate common functionality. Currently, the migrator will migrate Route.js to -.js, and all other routes will try and import app\routes\-.
According to http://www.ember-cli.com/#using-modules it should be migrated to app/routes/basic
We also do the same with views/components/controllers, but I think (hope) that this is a general clause in the resolver rather than something route specific.
Happy to work on a PR, is there anyone I can bounce ideas and questions off?