Unless one believes Front Offices have foreknowledge of future events, No.
OKC changed their coach and had a deep run in the playoffs and we would not be asking such questions had they made it to the Finals.
Another thing ppl often disregard in these discussions is how difficult it is to get equal value in these trades:
Could OKC get another top-5 in return for Durant? Certainly not.
Maybe they could get a top-20 player, but one can only guess who it could be and how the trade could happen. (Can you imagine Indiana giving up PG for Durant? Me neither.)
Most likely, they would get a quantity for quality deal: a combo of good but not great players and draft picks (Think Garnett to the Celtics, Love to CLE, Garnett and Pierce to Brooklyn, Rondo to DAL).
The first problem is the reaction of the fans, which in OKC might be a bigger problem than in Boston.
Second and more important, in the summer of 2015 the FO of OKC was justified in thinking they had a top-5 team which was still able to contend, which is the key difference from the situation in all the aforementioned trades. Unlike Minny when they gave up Love, OKC knew they had a good team.
Most teams, when they have a contender try to keep their roster together for as long as they can because re-building is difficult: to be fair to OKC, this is what Boston tried to do (and failed) with Allen.