Gotta disagree here. Like I said a few posts back, if Tesla wanted to make this simple they would make it invisible, handled by hardware switches and smarts onsite.You would pull up to any open charger and charge at the max power your car can take at that moment. If there are 10 charging spaces, up to 5 random spaces would deliver full power. If it gets busier than that well drivers will start seeing a reduction in charge, but for the typically quiet rural supercharger site things would be much better for up to the first half of total charging spaces in use, meaning almost all the time.
At the currents involved, the hardware to do that would not be cheap and would be another failure point.