Just comparing the UT practice coverage with UGA's, UGA normally practices about 12 "periods" per practice. The UGA AD usually limits media coverage to the first 3 periods only, which collectively are mostly just warm-ups. After practice the GA media is allowed to interview CMR and, by scheduled appointment, certain assistants and players.
If the UT AD does the same, then Hyams (or even Kane) may not have the access to verify how the QBs (players) are actually being coached, until the end of practice when he may be able to interview. Then, I would expect that it is hard to ask CLK or Reaves in a polite way if they are yelling or mentoring. (I guess CLK could say, "What's the difference", but coach-speak may not match what a reporter observes first-hand.)
Practice is pretty much open to the media right now. When game week gets here, however, they are going to limit it to the first part of practice, which is generally not game specific work.
The old staff limited media access to the first 30 minutes of practice, which of course, pretty much just included the stretching and warm up period. Media was also allowed in pre-season scrimmages and post practice press conferences.