I like the comparisons of Miller (cerebral-ness that makes the most of limited tools), Roy (crafty patient dribble), and Rip (deadly midrange). You probably have to add in Wes Matthews (rock solid three point range) as well.
If he were about 3 inches taller, could finish at the rim, and had great defense he'd be the complete prototypical shooting guard for the modern NBA.
It's funny how nobody in local or national media talks about upside anymore with him. If you took a vote on which Blazer will take The Leap this year, it'd probably be Harkless, Leonard or Aminu, or perhaps a shrug, depending on how optimistic you are about the team.
But how often is a guy a done deal after starting for just one season? Why is 21ppg CJ's natural cap on scoring? Everything he did last year will only improve with more shots handed to him by a third distributor in Turner, with more experience against NBA defenses, with greater familiarity with his teammates, and with a $100m contract that labels him among his teammates and the NBA at large as an elite scorer.
When Damian Lillard was 24 he had ridiculously similar stats to CJ. And people talked about him like he was a finished product too. Next year Lillard goes on to 25ppg (and if you think that's Dame's upper limit, well, you just aren't paying attention. He was only 25 last year.)
CJ's growth isn't close to done. The Lillard/CJ parallels continue. They continue to sleep.