Another important aspect to consider in this conversation is that college basketball has much less talent separation at the top than other sports due to the fact that college basketball's best talents only stay 1 year.
What do I mean by talent separation (and I'm certain there's a better word / phrase to use but I'm operating without coffee this morning - someone help me - thanks!)? In most other sports (NBA, NFL, etc), the total talent in the sport is arranged like a triangle:
So, there's only one Lebron James, and below him in the next tier are about 3-4 players who are great but not as great as Lebron, and below THEM in the next tier are about 10 players, etc. In a "triangle sport" like the NBA, the top player Lebron James is a much better player than the 10th best player in the sport.
Likewise, in the NFL, Aaron Rodgers and Tom Brady are much better and much more valuable than the 10th best player in their sport.
In college basketball, though? Our best talents don't stay more than one year and build the experience needed to dominate. College basketball's overall talent is arranged like a trapezoid:
We are a "trapezoid sport." Marvin Bagley might be one of the top 2 talents (along with Michael Porter, imo), but there are going to be about 20 veterans of college basketball that are going to be roughly as good as Bagley this season, including Duke's own Grayson Allen.
What I've been getting around to saying is that it's not all that amazing to have the alleged best player, third-best player, and fifth-best player in the sport on same team in a "trapezoid sport." Because there are about 20 other players out there who are roughly as good, and some of THEM are going to play together as well. In a "triangle sport," yes, it'd be utterly amazing to have three alleged top-10 players of the sport, and you could be expected to be head and shoulders better than the competition.
Alternatively, if players still stayed 4 years, college basketball would look much more "trianglish." A team with senior Bagley, senior Carter, senior Duval, etc. would destroy the competition. A senior Bagley would have separation between him and the 10th-best player in the sport. But alas, that is not the case with college ball. We a trapezoid, not a triangle.
And, so yes, cautious optimism is best.
Hopefully my coffee-less post can be understood.