That Cunningham is not at all reliant on athleticism makes him an even better prospect, imo. 
It's tricky. I said the same things about Luka Doncic and Markelle Fultz. Got one right and one horribly wrong 
So Gouki88 has about the same batting average as the scouts.  I think this is a big thing that many who post don't account for.  Drafting is a crap shoot even for scouts and GMs who break down every minute of film and talk to coaches, etc.  There is no way to project a players talent with certainty.
That is why in general, you get the best result if you have more chances at top pick.  If you have the number 1 and trade for say #5 and a future pick you hope is in the top 5, you have twice the chance almost of landing a start.
The Doncic - Young trade may prove to counter this general approach but I think that is more about the player ATL targeted (Young) than the strategy.  Young has turned out to be good but he is so small.
I don't know if Cunningham is sure fire or Mobley or who ever and neither do the scouts.  in general, I would trade this #1 if I got Mobley and another really good pick or player.  Maybe Cunningham is the next Magic Johnson, I don't know, but that is my philosophy on drafting.