With the advent of Social Media, every college player can be hyped up prior to the draft. A better gauge of potential is to see them perform in action (NCAA, Euro league etc) but its not 100% sure pa din. Some top picks become busts and some non drafted player become stars.
Dyan magagaling ang GSW, OKC, Spurs etc. Talent evaluation and player development. Ibang teams naman no matter how many times they end up in the draft they tend to have very little to no success at all in drafting.
example of overlooked talent are the ff: Jimmy Butler was drafted 30th overall. Giannis was 15th pick, Jokic was #41 in the second round of the draft and the best undrafted player of them all: Ben Wallace (NBA champion, 4 x DPOY awardee, multiple all star) and shoe in for HOF