One thing I'm concerned about is defensive rebounding. Looking at the pre-season games it was obvious the Cavs were having a problem controlling the defensive glass. Those really long, skinny guys (Allen and Mobley) were getting pushed around a bit.
The first four games the Cavs allowed 13, 12, 13, and 14 offensive rebounds. Last year the team that allowed the most offensive rebounds per game gave up 11.2, so if the Cavs don't improve their offensive rebounding they will be worst in the league by a large margin.
However, a lot of guys played in those games that won't be playing this year, or at least won't be playing as many minutes. In the final pre-season game the Cavs started the jumbo lineup of Mobley, Allen, and Markkanen. With Sexton resting a shoulder injury they started last year's small forward, Isaac Okoro, at the 2. That group wasn't on the floor for long but the guys who played the most minutes off the bench were Stevens, Fall, Wade, and Valentine. IOW, they started big and stayed big. Stevens, Wade, and Fall combined for 20 rebounds.
The Cavs only allowed 8 offensive rebounds to the Pacers in that last game. The best team at preventing offensive rebounds last year allowed 8.0. So by going with the jumbo lineup the Cavs went from worst to first in controlling the defensive glass.
Obviously we're not going to see Fall, Wade, and Stevens combine for 71 minutes this year. If they keep Okoro at the 3 and start Garland and Sexton in the backcourt, I'm concerned about second chance points. I think they should just make Okoro a 2 once an for all and divvy up the small forward minutes between LM, Cedi, and Windler. That would improve the rebounding at two positions.