The one thing I wish they did with these things is make the roof out of solar panels.
These things are going to spend most days sitting outside in direct sunlight. They have nice big flat roofs which makes them pretty perfect to throw on solar panels. You likely would not need much charge infrastructure for the new vehicles and you’d have cut the ownership cost down even more significantly (especially in states with high electrical rates).
Regardless, these things are a no-brainer even without solar on all the vehicles. These are low speed vehicles with dedicated routes and loads of stop/go action. There’s not a more clear place to use an EV.