Maybe this is because Ruff being handed the keys is the most likely thing that will happen. Pegula isn’t going to can the whole front office and bring in some strangers, no matter how well-regarded they are. He abandoned that strategy a while ago. Trust is above competence.
That said, while I don’t think Ruff knows how to coach them to be better, it would be astonishing if he didn’t know what the problems are. I don’t see a POHO as one who is dealing with the day to day management of the team, a GM does that. Although they may have veto power, I see Ruff as more of an advisor. I would rather him have this role given Terry has held this role since forever.