Can an observer tell who has access?
Name somebody who publishes a key. This page will do exactly what a stranger watching the chain could do: work out where that person’s grant would live, and look. On a v1 name it finds it. On a v2 name it cannot even compute the address.
Everything ever written to it
Every write to this name is an event on the resolver, and every event is a transaction anybody can look up. Below is that history, newest first, with what each write did said in words.