Great post, hit the nail on the head.
Adding to what you said about this team feeling different, I agree. Never have I seen a team so confident in their game plan of wearing an opponent down. They are confident every time that no one can keep up with them over 48 minutes, over a 7 game series. Time and time again, they are proven right. This team plays the game within the game better than any team I've ever seen. Credit a lot of that to Kerr and his experience with the Bulls teams. He's seen every situation. I also agree that the Warriors didn't play up to their ability these playoffs. They had a bunch of injuries and Steph had basically missed 6 weeks of action before being thrown into playoff basketball. It took a while for the team to get the rhythm back, but it wasn't all the way back IMO.
It's no surprise that the Warriors were the best 3rd quarter team is history. Sure some of it is because of complacency in the first half, but a lot of it is them just outlasting other teams. Their style of play makes you work on both ends with consistent player and ball movement on offense, and forcing teams to ISO more than they'd like on the other end with all their switching on defense.
Talent goes a long way in trying to build a strong team. But throwing talent together doesn't guarantee anything. We've seen plenty of stacked teams just not work because of many factors. Fit has to be there, and everyone has to be willing to sacrifice (to different degrees). None of this works if Steph says "this is my team, we don't need KD", or Klay says "I don't want to be a third option". You have to give credit to great players who are willing to sacrifice for the betterment of the team. These guys truly value winning and their actions show that. I can't think of another team who was this good (or close to it) that was this unselfish from top to bottom, it's just so rare.