This is a very important hire and he's not a perfect candidate. He's a good candidate, but..
His team's offensive ranks are not exactly jumping off the page. Defense is fine. For perspective, Ollie's best offensive team was Napier and we finished ranked 39th, and Ollie has had essentially 3 seasons either right at or better than Hurley's best offensive season. The unknowable argument is how Hurley would do with Napier-level talent, and hopefully we get to see.
For the record, Nate Oats had Buffalo at 36 this year and Crean had 5 top 30 offenses in his last 6 years at Indiana (and 4 top 30s at Marquette). If there's one thing Crean can do, it's coach offense (Defense... from eh fine to not so good).
In summary, it's worth debating and thinking about other options. If people said "Don't even consider Danny Hurley", that would be one thing. But it's also not appropriate to act like he's a perfect flawless candidate.