Indeed. Frost is a similar situation for me. He may be an all star eventually, but no way to know for sure at this point in his career.
There are only two names being routinely mentioned I feel confident in being a guaranteed championship level coach. After that, there is a some amount of risk with just about everybody. JMO IYAM.
I like his offense. Are you judging on this year or have you watched him previously? I admittedly haven't watched them much since the early season.