I have a different take. If he was "as advertised," Canes media would be talking about him in the top 4 or "in the mix" (instead of not talking about him at all). In more private settings, I have noted the conspicuous absence of any reporting regarding Hill for over two weeks. Every other player you named has been referenced by Canes media (whether CIS, Donna, Lake/Gaby, or Flo) over that span.
For instance, CIS posted this article 10 days ago on DBs:
Originally from miamihurricanes.com by Christy Cabrera Chirinos Meesh Powell has played in more than a few big games. A redshirt senior who transferred to Miami after five seasons at Washington, he was part of a Huskies team that not only earned a berth in the College Football Playoff last...
www.canesinsight.com
DPJ, Brown, Richard, and OJ are all referenced by name. Among scholarship CBs, only Stafford, Hill, and Mack weren't named (but D$ has at least mentioned Stafford in more recent posts). A couple of days after that article, Alex Donno talks roster on his pod and Hill and Mack are the only two CBs on scholly not named. More recently Lake and Gaby did a pod and similarly mentioned every CB but Hill and Mack. Lake went so far as to name his unofficial "top 4" at CB and Hill wasn't named.
The silence seems intentional.