Personaly set speed limit :
Having a "personaly set speed limit" feature that could be set for a given trip planning, independantly from the speed figures of the drives taken in the past (i.e unlike the already existing Personalized ETA feature) would allow to get planning results corresponding to one's own speed limit decisions, whether they be for EV range optimisation, trailer towing, vehicle capabilities, fuel efficiency on combustion engine vehicles, or other reasons... That would actually also allow to see what is the time cost of "taking it easy".