If it was owner unrest that saw Hinkie out, then fine, but it certainly seems like the NBA itself had at least a helping hand in getting rid of Sam. I'm not sure if he could've foreseen that.
I think his best trade was the Kings trade. Even though Stauskas stinks, the idea that we could get the Kings unprotected 1st round pick the year after Cousins' contract expires is insane to me, and we did all this to give up two Euro stashes.
I'm not a fan of lottery reform. I still don't know how it would address competitive balance issues or prevent tanking. Do you really think Sam would've done something entirely different if he had a 67% chance at a top 5 pick with a 20% chance of getting #1 overall? I'm not sure his strategy would change all that much. Besides, I'm not sure how this addresses the significant competitive balance issues in the league.
But I think it's easy to underestimate what Sam Hinkie did as GM, it goes beyond trades and cap flexibility. The amount of opportunity the Sixers have to get into championship contention is legitimately insane. Even discounting Embiid (who despite all indications he'll play in preseason is still a question mark in terms of health and whether his skills diminished the 2 1/2 years off from competitive ball), the Sixers have a very high chance to get another top 5 pick in this year's draft, and they have room for at least 1 max contract, and could make it 2 depending on their moves next summer.
The Sixers aren't just setup well because of trades that could pan out or by tanking, they're set up well by a coherent strategy that literally gave us freedom to strike and sign guys when the opportunity arises. It gave them cap flexibility and multiple high draft picks in a league where teams pretty much have to build through the draft with few exceptions.