It's too difficult to rate this draft. These players are all young with Hanga being the oldest. Can anyone rate last year's draft picks of James Anderson or Eliot(purposely misspelled) Williams or Epke Udoh? Stuff happens.
I'm pleased with the draft and the future of these picks. Leonard was a lottery slotted talent projected anywhere from 6-15. He's got greater wingspan (7'3") than say Jordan Hamilton, Chris Singleton, Marcus Morris or even Derrick Williams. Spurs fans have been wanting a long 3 who can defend and although he's a not a 6'10" shooter, he is a good defender, terrific rebounder and an energy player who can contest shots and deflect passes.
The Spurs staff should have had plenty of opportunities to get to know Cory Joseph. He has some special qualities about him and he's a coach's kid. He should have stayed another year at UT to improve his PG skills but he can play.
Bertans and Adam Hanga looked good in the videos I've seen but I have never seen these players play...so I will limit my opinions and take a "wait and see" approach.