Sorry for the late reply, Ohio Guy in Jersey. Here's a rambling stream of consciousness about it since I have to run but wanted to respond to your fair question..
With what Thad is paid combined with things like the talent available in Ohio alone, the conference he coaches in which helps recruiting because kids get to play against typically and consistently top-level competition, the city of Columbus as an attraction to an 18-yr old kid, the facilities / perks provided to the kids, the draw of Ohio State University in general, the fact that while football is and always will be King people will indeed come out and support a competitive program, I think it's realistic to expect Thad produce at least a Top 15-20 team that finishes in the top quarter of the B1G and is a lock to make the NCAA tournament every year with a legit shot (maybe say "favored shot") to make the 2nd weekend.
I get ebbs and flows will happen as a result of early departures etc. and I've stated I believe it's inarguable Thad is the best coach in the history of the program. He deserves(d) some time, I get it.
My biggest issue is that I see a roster of only role players over the last 3 or 4 years which is compounded by the reality they don't seem to improve much leading me to question if Thad has lost his magic recruiting touch. And I wonder if health is a factor. And if it is that's problem because his health won't get better. Thad has missed on a ton of Ohio/regional kids that could've been difference makers over that 3-4 year stretch. If he can't snag one or two of those guys every couple years, it will be hard to live up the previous standard he created - and which he is paid for. Especially if he not only misses on the big time guys but also swings and misses on guys like Nick Ward, or basically taking Loving over Nigel Hayes, or not keeping Adrien Payne in state etc.
I've been a big defender of Thad up until UCLA. Not that I expected OSU to even be competitive in that game (which is part of the problem) - it just finally hit me that I was done celebrating moral victories after roughly 3.5 years of doing so. Sometimes you just need change for the sake of change. I truly do hope Thad can turn this team around but if he can't, I'd also be fine with a total house cleaning with a fresh voice. Just how I feel.