His jump shot has seen a big improvement and he's a better player now than he was last year.....but how confident would you be that he would get the bucket that you needed if you drew up a play for him on the final possessions of a game?
That is why he wouldn't be in my top 5.....because he has no dependable go to move or shot.
IMO, he should be right now, at worst, what Amare Stoudemire was in his first season with the Knicks. He hit all the big buckets for them. He could shoot from outside or get his bucket in the post.
Griffin has all the talent and athletic ability to be that and more, but he isn't.....at least not yet.