Definitely, I was going to post the same thing.
Ideally, we should be able to specify a route, name it and be able to export it. We should also, of course, be able to import routes that have been created by others. This would nicely support Zwift Insider’s “Rebel Routes” series.
We could even build the routes outside of the game, the same way workouts can be created.
It’d be great to have a selection of start locations too.