I understand criticizing Lue for this regular season. What I find unbelievable is when certain posters argue that Lue had nothing to do with the Cavs success in the playoffs last year (the "it was all LeBron and Kyrie" argument) and then those same posters praise Blatt endlessly for the 2015 playoff run. So does coaching matter or does it not? Be consistent.
In general, people underrate how much coaching goes into each playoff game and series. Blatt deserved more credit from people outside Cleveland for his playoff run. And Lue deserves more credit from Cleveland's own fans for last year's championship.
There was a ton of evidence of Lue's impact on the 2016 championship run. Since his hire Lue turned an offense that was efficient but predictable (and one that I always felt was dull) into one that was explosive and creative, and one that leveraged the Cavs shooting with great spacing. Right off the bat he found ways to involve Love that made him happy, even if in the aggregate Love's touches were more or less the same. In the first three rounds, the Cavs were breaking three point records seemingly every other game. Lue found a great bench unit and used it in creative ways with all sorts of variations on the Delly-LBJ pick and rolls. He drew up awesome out of bounds plays throughout the playoffs. He also wasn't afraid to play LeBron at the four for long stretches. He wasn't afraid to bench Mozgov when it became clear he was a shell of himself. He wasn't afraid to bench Frye in the Finals when it became clear he couldn't hang with the Warriors or to bench Delly when he was no longer able to contribute (even though both Frye and Delly were huge parts of the bench lineups that the Cavs discovered in the previous rounds). He got the most out of Richard Jefferson, starting him unexpectedly and using his ability to switch effectively. And yet when it was game 7, Lue went back to Kevin Love despite the mediocre series he had to that point, and we all know how big Love was on the glass in that game. He used veterans like Dahntay Jones and Mo Williams at just the right times. He relentlessly exploited the Warriors over-reliance on switching and exposed the two time reigning mvp by targeting Steph in pick and rolls over and over again. He figured out a way to slow down the lethal offense of a 73-9 Warriors team which was far more explosive than the 2015 Warriors's offense.
tldr - Ty Lue outcoached Steve Kerr in the NBA Finals, and along the way outcoached Budenholzer, Casey, and Stan Van Gundy too. And yet people are still gonna say the man had no impact on that championship run? Please.