If anyone wants to read why Ball is so highly touted, here's a good place to start:
https://www.si.com/nba/2017/05/18/lonzo-ball-nba-draft-best-point-guard-scouting-report.
One of the main questions is how good one thinks that T.J. Leaf and Ike Anigbogu. If they are really first round talents, then Ball is playing with a much superior cast. If they are not, then Ball may be a wunderkind, at least in the college game.
I have three problems with Ball. First, he doesn't have NBA level strength or quickness right now, so he's going to be a liability on defense at first. Second, since he can't shoot off the dribble going right, the court's tilted and I don't know how effective a PnR is going to be since the defenders will be happy to go under the screen if he goes right. And third, if he does have any problem getting his jumper off in the NBA, he's going to be a below-replacement level player even with his wonderful court vision.
To me, Jackson, Fox, and Smith Jr. have much higher floors and (barring injury) will be in the NBA for a decade. Tatum probably will as well. Ball is much much riskier than that.