Fallback routing service chain
It could be very convenient to be able to define in Locusmap Navigation configuration something like "Fallback routing service chain", defining LocusMap actions, if the primary routing service is out of order.
Aside of the convenience, it could prevent user reports about not working LocusMap map navigation.
The fallback event could trigger the user notification, like: "Mapquest routing not available, used YOURS instead".
An alternative could be, after the failure message, to allow user switch the service and calculate the same route via the new one.
The current state may lead many users to "What to do now ?" confusion.