Rizzi also interviewed for the job. Glenn wasn't offered the job and Rizzi was given a promotion to Assistant HC with his ST Coordinator duties. That alone tells me who they prefer as a future HC.
I don't think that indicates a preference of Rizzi over Glenn. Glenn wasn't here to make him AHC. And I don't know if Loomis made Rizzi AHC. Usually the head coach picks his staff so I would've expected that to have come from DA.