I think it would be better if doctors reduced 1% of drivers health during training each half a star instead of each star. That way they would actually be more useful instead of everyone owning a 0 star one.
They'd be more "useful" if they had some other ability besides training. Once your current driver(s) are fully trained, you no longer have a use for an effective doctor.
They'd be more "useful" if they some other ability besides training. Once your current driver(s) are fully trained, you no longer have a use for an effective doctor.