For one, Simmonds wanted to leave and we weren't going to chose him ahead of our AA ruckman, a stature Simmonds have never reached, pretty much the same story for Jolly, just lucky for him he now has a premiership. Sewell for Ferguson rested on Ferguson's shoulders as he was contracted, and he didn't want to leave.
Judd was a money hungry $%^ and said more about himself than of the club. I wouldn't want Nick Stevens anyway. We couldn't have kept Scott Thompson as he wanted to go home, we had no choice.
As for the rest, we all know the draft lies on luck, the same teams who went well on those blundered on others. We've picked many good players when there were worse players going before and after them, the draft is luck and many of your examples were out of our hands.