I didn't really see any different level.
I would say they screwed up not doubling KD, our other guys were missing the shots that they got, giving them more shots likely makes this more of a blowout for Boston.
I would argue it was bad scouting by Boston, because other teams have doubled KD and Book, in the fourth especially, with great success. I guess they thought with as good of defensive players as they had, they could just play us straight up and stick with their normal defense. One big mistake was not putting Nurk back in when "Boston often planted expert defender Jrue Holiday on a center, shutting down Phoenix’s primary screening actions since no team would willingly put Holiday into the play." Earlier in the game when they tried that with Nurkic in, he just bully balled Jrue. He pretty much had his way inside on offense, and helped slow down the offensive rebounds by Boston. Without Nurkic in there, we lost what little control of the paint we had.