Roberson was 8.4 pts, almost 9 rebs, this past season, so you aren't projecting much of a jump. We won't be as perimeter oriented, and Roberson may get more opportunities than when Cooney, G and Richardson were the bulk of the offense. But Roberson needs to add a dimension to his offensive game. Damone always had a jump shot; it would be a nice surprise if Roberson has found one as a senior.
If Roberson does not add a dimension, he could lose minutes with the addition of White, and the added depth we have in the frontcourt.