the inclusion of "unverified" in the case of most unknown traffic is saying that there is a chance that the height information could be completely wrong
Totally True, but not relevant to the question posed at the beginning; which would apply whether reporting Verified or Unverified traffic i.e. whether to call the height indicated or relative position, hence it is something of a red herring in this instance surely?
(Politely) Get back in your shed - either of them!