The risk in my view has less to do with what Rhule thinks he's getting in these coaches and more to do with the lack of Big Ten/major conference experience and probably coaching experience generally. As we learned, or at least ought to have learned, with Frost is that the pool gets much deeper when you get into major conference football. And sure we can name a million ways in which Rhule is different than Frost.
Supposing this staff is "final", here is what we're looking at in terms of full time assistant experience and P5 assistant experience (Note that assistant to assistant coach as is the case in the NFL doesn't count, only dudes who ran their own shop. For example, uncle Donny spent 3 or 4 seasons as an assistant to Hiestand in Chicago that doesn't count)
Total experience (P5/NFL experience)
OC/QB: Satterfield 17 (4)
WR: McGuire 0 (0)
RB: Barthel 4 (0)
TE: Wager 0 (0)
OL: Raiola 2 (1)
DC: White 14 (6)
DL: Knighton 2 (0)
LB: Dvoracek 2 (0)
DB: Cooper 5 (5)
ST: Foley 30ish (0)
66 total years, 16 in P5/NFL
Of course all of these guys have lots of experience being around football but that's true of almost every staff in America.
By contrast
If one were to want to be glass half full, you'd look at Fran Brown, Elijah Robinson, Joey McGuire who were green af and are now some of the biggest hitting assistants in CFB/HC themselves, but they had a whole heck of a lot of experience around them to bring them along.