similar to drive-through id like to see maxheight as well as maxweight and maxwidth added to the default fields for parking. This will help improve information about what type and size vehicles are safe to use a particular multilevel or above ground supported parking.
I’m guessing that you might be suggesting changes to the iD editor. If so, the best place to do so is where it is developed, which is at https://github.com/openstreetmap/iD/issues .