For the rest of Coach K's career, Duke will always need a big class coming in the following season. Nothing special about 2020 in that regard, imo.
Definitely not as good as Zion, but then again, Duke has had many wonderful teams without an individual player as good as Zion. That's not a reason to be discouraged.
I do think we'll have freshmen that will be effectively as good or better than RJ. RJ's game was somewhat neutered by the constant pack-it-in schemes (of which his own shooting was no antidote). If Duke could even put two shooters on the court, we'd have gotten FIBA RJ / #2 overall draft pick RJ more often, in which case I would agree that none of these freshmen would be as good.
I'm ambivalent about this one. On one hand, Tre's been a very good (80%) FT shooter since he was a freshman in high school.
High school stats here (and in the graphic below). The FT shooting shows that Tre has shooting touch in him, which typically bodes well for improving the 3-pt shot. On the other hand, he's now had two consecutive seasons in which he's hit the wall in terms of 3-pt shooting improvement.
Tre's senior season in high school, he tried to become more of a high-volume 3-pt shooter and saw his percentage drop accordingly to 29.6%. (Previously in high school, he was very low-volume, taking presumably wide-open shots, which he canned at a mid-30s percentage. [Incidentally, this is why it was silly, imo, for Duke fans to ask Tre to pass up completely wide-open, no-closeout threes]). And then his freshman season at Duke against a higher level of competition and a slightly longer 3-pt line, we saw his struggles first hand.
So, can Tre become a 35% 3-pt shooter as a sophomore? It's possible but I'd put the odds at 50/50.
I love the latter two predictions -- that Tre will be the star of the team (and indeed probably the team's best two-way player) and that we should expect some defensive dropoff given his increase in offensive usage.
BUT, I disagree that he's Duke's sole playmaker. I think Wendell will be effective as a secondary playmaker on the perimeter; I think Hurt can playmake out of the high post
(think VaTech's center whose name escapes me right this moment); and I think we can throw the ball to Vernon on the perimeter and he can faceup against opposing college centers and make plays as well.