I think our lack of depth scares me more than a lot of height in the front court. Lav wasn't planning to have these guys play man-up defense for long stretches of time anyway. And our matchup zone requires the guys to rotate so much that it's just as likely an opposing post player will catch the ball with a wing like Moe or Harkless as they will GG or Pelle if he were here.
Plus; the smaller, but longer, and more athletic, lineups have huge advantages on the offensive end - we can run opposing PFs and centers into the ground. Not to mention we have an extra shooter/ball handler on the floor to help spread out the offense. I think the added athleticism and hands on the offensive end helps make up for some of the lack of height on defense.
But- that 7 man rotation will be a problem. No team goes a full season without injuries. And certainly not us, or anybody playing in the BE for that matter. These guys are going to get banged up, and fouls concern me, not so much defending bigger men, but getting rebounds. There's a thin line between being aggressive on the boards (which we'll have to do) and picking up silly fouls.
Lets hope we get Amir here in December. An extra man in the rotation will probably be surely needed by then.