Riley's definitely the brains of the operation, but I don't think anyone really credits him with coming up with that lineup shift -- which was, undoubtedly, part of the reason Miami did so well. That and their unsustainably frantic trap-at-all-times defense.
I think that your second article hints at exactly what I'm saying: in 2010 Spo was cowed, and deferred to LeBron, which lead to Wade and James taking turns running iso plays while Bosh added wings to his mansion during timeouts. Once the kinks got ironed out, the Heat were one of the league's best offenses and defenses, which is why they were so successful.
That said, I do think Rick Carlisle outcoached Spolestra in the 2011 Finals. Spo gets the edge over Scott Brooks (but a monkey writing shakespeare could come up with "give ball to durant. let him shoot.") and grades below Pop.
Blatt might be the best coach James has ever had in the NBA, but I don't think Cleveland's front office will ever allow him to act like a coach (which your linked article also references).