Stockton and Malone were already Stockton and Malone under Frank Layden; while they benefitted from Sloan's system, I think Sloan's system benefitted from them, and they'd have been Hall-Of-Famers under ppretty much any coach.
That said, in many ways, Sloan and his system are almost akin to the college coaches and their systems moreso than to professional coaches and their systems, and his legacy looks more like one of a long-time college coach: 20 years, tons of victories, no championship. And that's sort of expected.
If I were to tell you Utah wins the West, has the best record in basketball, yet Maurice Cheeks has the Sixers (oops...there goes the thread) in contention for the title in the East, who's going to get the COY hardware? The fact is that Sloan has been so good for so long that good coaching from him is pretty much "no big deal" to the average person voting for COY; "Well, OF COURSE Jerry Sloan's team did well...it's Jerry Sloan, for crying out loud; but look at the incredible job Scott Skiles did in Milwaukee...."
And the scariest part is that his assistant, Phil Johnson, *IS* a former NBA COY, and in many circles is regarded as the best assistant coach in basketball.
Folks talk about the Jazz homecourt advantage, and the Jazz consistency, and the Jazz system, and the Jazz bench, and the latest greatest flavor of the week when it comes to Jazz player. But think of the benefit of having the SAME MESSAGE to players for 20 years. Keep in mind, the only reason Utah was able to get Boozer is because of his admiration for Karl Malone and his desire to be like Malone. Having Malone's old coach still walking the sideline was a big factor in his decision. (And, of course, a boat-load of money played a slightly more than insignificant role.)
What's it going to take to get folks not just talking about Sloan for COY, but actually VOTING for him?