I agree. I don't feel red shirting is as beneficial in basketball unless it's for medical reasons. Players like Marshall and Amile just aren't common. Most of these kids want out in 4 years or less and they all want to play. Duke has had players transfer out that were looking for PT; if they would have redshirted, not sure that would have made them stayed.
Not getting into the what ifs but these kids have talent. I coached Miles Norris's brother, spent time around TJ Leaf and K Leonard (SDSU) and during their HS/AAU days both Miles & TJ were extremely gifted early on, but Leonard needed SDSU and not the Spurs to become who he is today.
I just feel Alex, Jordan T and Jordan G aren't just at Duke to be 4 year players who take up roster space, get recruited over and don't contribute. I think the staff sees something in each of them where if coached, trained and developed they could surprise.