Just because it's preseason doesn't mean the Cavs won't face some major issues this year. Their second best player (IT) might miss dozens of games. Their starting backcourt right now of Rose and Wade are horrible 3pt shooters and defenders. Their starting PF is 6'6" and their starting center is 6'10". Lebron is about to turn 33 and is already struggling with ankle issues, and has one foot out the door for LA next year.
Let's be real, of course: this team is making the playoffs. And when they get there, whatever seed they go in with, they'll be a favorite to reach the finals. But don't be surprised if they struggle in the regular season and win something like 48-50 games.