The Cavs got huge nights - i.e. way above their norm - performances from Morris and Mobley, which had everything to do with Cleveland being able to hang around the way they did.
Also Mobley, for whatever reason, was in all their heads defensively. I know he's a decent shot blocker, but they were afraid to challenge him. So the default was kick the ball back out - and eventually take a 3. That likely goes away in the next series.
It bugs me a little that Joe, once again, wouldn't use all the tools available to him - i.e. Tillman - if only to annoy Mobley a little bit since Kornet couldn't guard him. If the Knicks are the next opponent, Tillman can help in that series - whether or not Porzingis plays.