Want I’d want to see is a focus on level 5 autonomous driving from day 1. (Edit: Even if the system is level 4 to start with.) Yes the current coverage area is limited, but if you live in one of those cities the coverage area is easily large enough to be useful.

Oddly enough I think this is one of the few times when a subscription model makes sense. The current approach has a fallback call center which can give the cars driving directions in unexpectedly situations, which could be supported by either a monthly subscription or low hourly fee. Similarly move out of the coverage area and stop paying etc.