One, Herbst does not have control over 1 key issues - an open slot at a p5 conference. Only the other conference can decide that and has we have seen with the back and forth discussions. facts, and rumors within the XII, it is not always a clear-cut process for them, also.
As for hiring Mike Tranghese, that seems to me she knows exactly what she is doing. She is the University President and is pulled in hundreds of ways, such as dealing with the fools and the mess at the Capital in Hartford right now. Conference expansion is such a important issue to her and the university that she knows she cannot give it the attention the issue needs. So, she hired an outside consultant, who is well connected in the college athletic circle, to do the heavy lifting and the connecting. As a consultant, he also likely lies outside of public FOI requests, which could derail any on-going, sensitive discussions.