The time allotted for each team's selection was tiresome and created a loss of interest after the 8th selection. 5 minute selection time for teams (wait time for audience) should be brought down to 1 minute. Also, there were no physical activities, therefore the ticket price didn't match the event.
With this being the NBA draft, there could have been 3 point contests, free throw contests, dunk contests, half-court shot contests, dance contests, basketball trivia contests, photo opportunities with players and media personalities, meet and greets with draftees, and raffles for prizes and merchandise. Also, since it was held at the Barclays Center, the entire Brooklyn Nets could have been there for the fans.
All of this feedback from the 15 year old student I took for a mentoring program.