Moss isn't what I thought he'd be at this point either, but if you put his 2nd-year college stats side-by-side with Jok and Marble you'd actually find them quite comparable. Here are the 3 side by side with names taken out
11.5 points, 4 rebounds, 4 assists, 39% 3pt, 30 minutes
11 points, 2 assists, 2 rebounds, 39% 3pt, 24 minutes
7 points, 1 assist, 3 rebounds, 34% 3pt, 20 minutes
Again I think it goes back to this years team not having any productive upperclassmen. When Marble and Jok were Sophomores they had junior/senior leaders who were the focal points (Gatens, White/Uthoff/Gesell/etc). Most of Fran's players don't come right out of the gate swinging hard. This year his young guys are being forced to.
One massive problem this year is Fran's Junior/Senior recruiting classes are so weak that these young guys are getting exposed before they're ready.