He's what I expected. He's 20, which is still young for even summer league. If he played on a bad team he'd get enough minutes during the regular season to put up a bunch of double-doubles and everyone here would clamor for him.
I have not had much in the way of expectations for him this year. 10 minutes a game or so, hopefully more towards the end of the season. If you want a better version of Ante Zizic for a year, you should hope Ainge gives Pachulia the room exception. Collectively they could give about 25 minutes a night of energy at the 5, with Horford picking up still the bulk of his minutes at center.
But I knew some people would be disappointed when they seemed to honestly believe that Zizic would be an upgrade over Amir. My hope has always been rookie Zizic would be as useful as second-year Perkins. It would be a big deal if he could match third-year Perk as a rookie.