Mine are injury adjusted now too, but back then I didn't make any adjustments because I pretty much only used them for my Fantasy League draft in December. What was so disappointing at the time (and still to be honest) is Crean is one of the few coaches who's teams never significantly outperform the roster rating (other than the D. Wade team which predates my ratings anyway.)
Beilein's Michigan teams for example have significantly over performed several times... Painter too
Yup.... as you well know, one year of stats don't show much, it can be luck, but when you see the same trend for 15+ years .. well.. you're very underwhelmed by his results.
You also know that it seems in a majority that the "good" coaches have a few things in common. Like valuing IQ over pure athleticism (smart play over exciting), valuing possessions (playing slow to minimize mistakes), and an emphasis on defense (so you can still win games when the offense isn't working).