In VA, if you drive EV, we already are paying vehicle fee with the registration (in addition to the ridiculous yearly property tax and endless tolls if you want to drive 5 miles in less than an hour :) )

Weight x mileage seems the most fair to me.

It should also disincentivize people from buying larger vehicles just because.

I am surprised that vehicle manufacturers would support a weight-based fee, given that their most profitable vehicles like SUVs and pickup trucks tend to be the heaviest.