It's not going to be this ridiculous jump, but it will change. And you can't go look at class rankings from a recruiting service to tell you the whole story. He's already responsible for over a dozen "flips/transfers." So those right there are not "pretty much the same." Most are guys the last staff flat out got beat for. People pull the "every school has transfers" line but this is not a typical influx of transfers.
Not to mention guys like Kaho and McKee and Romney and Ika and others aren't going to BYU without Sitake there. Recruiting is a long process and the further out we look, the better it is. There are already two (was 3) 4 star guys in the next class and a bunch more with close connections/interest.