I too would like to be able to set PINs via the app. This is NOT device setup, it is a key function of the lock. Every other HA system allows PIN entry via mobile and it is in the controls section of the device, not under settings since it is not a setting.
I don't think that Vera can consider this device supported if they are unable to take advantage of the most important feature of the lock. Unlocking the door from your phone with several steps is not all that useful, it is setting PINs, especially temporary ones for guests, that is useful.
Are there any developers left who work on this sort of thing?