They're still giving a regular season effort on the defensive end. Somebody blows by Kyrie on the way to the rim on nearly every play. Another Cav is forced to give help, leaving their man open, and then it's just a matter of making a pass under the basket and getting a wide-open dunk. As a few here have already said, the East is bad again this year. I think Washington would give them the hardest time (Wall will drive on Kyrie on every possession), but unless they play the Wizards, they aren't going to have to turn it on defensively before playing GS/SA/HOU.
If it is in fact Golden State, like we all expect, they're going to need to adjust beforehand. Last year they went down 3-1 before adjusting to the effort level needed to beat the Warriors. They won't have that luxury this year. If they aren't ready to go defensively by game 1, it'll be a short series. Golden State is too good.
LeBron said the team is nearly firing on all cylinders after last night's win. I hope he doesn't believe that. If they gave up 111 to Paul George and a group of mediocre/bad offensive players, they'll give up 160 to the Warriors.