I know it's summer and speculation is about all we have to do at this time, but the reality is (and I know this his a big "duh") that some guys will be better than expected and some guys worse.
Once the practices start in earnest, as Ruff said, the guys are going to practice and go at it every single day. Some will rise, some will fall, and we will be left most likely with 8-9 barring injuries, illnesses, or foul trouble.
Let the practices begin - I can't wait... and side note - Hurley has changed how he does things almost every year (to his credit) building on what works well, tossing what doesn't, and fine tuning or tweaking too. He's really really good. And has surrounded himself with a very smart group of assistants...