Ignoring the high odds that OP is a Louisville fan, this is silly. OAD isn't going anywhere, at least not as the result of any NBA rules change. And the entire story of why can be told in UK players alone. The "19-years old and one year removed from high school" rule protects the NBA from wasting millions on the Skals, Briscoes, and the Marcus Lees of high school basketball. It's completely free, and it's a *better* proving ground than the D-League. And if you think GMs secretly want the rule abolished so they can get access to undervalued players earlier, look no further than Hamidou Diallo. Kid oozes potential, and is basically a consensus lock for the lottery *next* year, and yet no team would give him even a first-round guarantee this year. Teams are risk-averse like any other business.
So there is every incentive to keep the rule in place, especially when you consider the union-structured draft and pay schedule. Taken together, the rules function as a safety net for the league's worst teams, which invites new investment (new franchises), and cultivates a high level of competition across the board (otherwise, the top teams could snag the best players at an early discount, because they are in the position to both throw away money and take recruiting risks since they already have a winning roster).
So there's every incentive to keep the rule, and so far as I can tell, no good incentive to do away with it. I haven't heard a compelling argument yet. The arguments made in the article are weak. "Lack of player development." Really? Do we honestly believe that the D-League coaches are better than top college coaches? And the "back in my day" arguments supposedly made by veteran players are so full of ****. Those guys spent multiple years in college instead of just one, and have the benefit of years of NBA experience coloring their evaluation of incoming players. They're also full of **** because a lot of the top college players come in and immediately become the MVP of their teams full of grizzled vets. Look at Davis, Wall, Booker, and Towns. And the author's argument that high draft variance benefits the NBA is wrong for the reasons I explained before. The watchability of the sport, and the incentive to invest, are both improved by consistently funneling the best talent to underperforming teams.
Nothing will change, and it shouldn't.