I grew up in Tucson before coming to UT for school, so I watched a lot of Sean Miller's Arizona days. When he was hired from a mid-major the message board question of "Can Miller recruit" quickly turned into "Can Miller coach" as Arizona missed the NCAA tournament for the first time in 25 seasons, which was a remarkable streak.
So questions about his coaching ability are not new. He responded in year 2 by taking the same group of relatively unheralded recruits he signed in year 1 to the elite 8 with a memorable sweet 16 destruction of a #1 seed Duke team featuring Kyrie/Singler/Plumlee. I have a hard time believing this guy who put together a run of conference championships and elite 8s that dwarfs anything in recent memory at Texas doesn't know how to coach. I mean he helped turn TJ McConnell from a nobody at Duquesne into a guy approaching $100 million in career NBA earnings, for gawdsakes.
I can't speak to his second stint at Xavier, but if the idea is his success at his previous major program job so far in the rearview mirror it is now irrelevant you need to accept the caveat that his last several seasons were clouded by the self inflicted wound of the "NCAA corruption scandal." This was a thing involving the horrendous crime of young athletes being paid for their services in a way that we are all cool with now. That first bubbled up in 2017 and was unresolved until 4 years later - it absolutely clouded his program and precipitated him going after international kids, some of whom were on the roster when Tommy Lloyd burst out of the gate with a 33-4 record in year 1 at AZ.
So I'm going to give this guy the benefit of the doubt in his first year. I won't miss the RT holdovers on this roster and was a bit baffled at why they were retained, but I'm going to pull for them this season like I do for anyone wearing burnt orange. Reserving judgement on next season seems wise when we haven't hit conference play yet, especially for a coach who has shown a history of player development and using transfers (pre-transfer portal era!) to build a competitive roster.