The MCW trade was evidence that Hinkie will always make trades where he gets a better asset for a worse one, not that he plans on trading away players if they get too good.
That Hinkie would deal a high upside prospect just because he was causing too many wins is probably inaccurate. However, if a rotation player without a high upside started playing well I would expect him to be dealt.
The current makeup of the team (high draft picks and boarder line nba players) indicates that Hinkie would deal a player for being too good if that player didn't have star potential. Isn't the idea that the Sixers are going to be bad and stay in the lottery to maximize their chances at a star with a high pick the entire strategy behind what Philly is doing? If a player without star potential plays well in Philly I think it is obvious he will be dealt.
The borderline players are the players Hinkie is assuming/assessing to see if they have some spark other teams have missed. It's extraordinarily egotistical, in some ways, but it is not necessarily a bad idea.
I don't think Hinkie deals the player for the sake of trading him. There's a bit of Ainge and Morey there -- they're not going to take any deal they can, even if they don't believe that the player has a future with the team.
How long is Hinkie's leash at this point?
I'd say he's got about three years for the team to be back in the playoffs with a young core talented enough to be capable of growing into a contender over next few years.
You give him 3 more years of not making the playoffs? By then the contracts of Okafor and Noel will be running out. I think Philly has to show signs of making the playoffs next year or it means none of their draft picks have panned out (plus they have been hurt badly by embiid potentially never playing).
I think Embiid's injury has cost them a year (a draft year, a top 3 pick) in their rebuild.
I think the added complication of J.Okafor and N.Noel playing the same position will cost them more time as well. Figuring out if they can play together or if they have to decide between the two of them. Then there is Embiid. Deciding what to do with him. Messy situation. 3 centers in 3 drafts in a row has cost them time in the rebuild and will continue to cost them moving forward until they figure that situation out.
I think Sixers need another top 5 pick because of Embiid. I don't think Okafor and Noel is enough of a foundation to push the team forward right away. Better to stay bad another year and pick up another top 5 lotto talent.
So, I think they'll have at least another year of being a bottom 5 team. Then more of a mid-lottery team (7th-10th pick range) as their young players improve the following year. Hopefully playoff contention the year after that (3rd season).
With a real genuine core that they can build a future title contender around as their youngsters continue to improve.