Sounds good to me. Many cars have cruise control now so the autonomous controls would be an extension of that but with the licensed driver always attentive and ready to take control.
One problem I see is that the autonomous controls might let a licensed driver get bored and fall asleep or lose concentration.
Humans are good at doing complex tasks but notoriously bad at monitoring something that is normally OK. The latter task is truly boring and computers are much better at it.