Your link doesn't really prove that prospects get rushed and they suffer. In fact, it seems that the whole article is about Dean insisting on over ripening prospects and them leaving because they feel like they aren't getting their chance. Further, Moller/Holloway were in no way comparable prospects to the 2nd overall pick. I believe this decade there have only been two 2nd overall picks to not make their team right away.
Also, I understand that a lot of Dean's philosophy was based on other sports, but baseball is not a great example. A lot of the reason that high end prospects are held back is due to the team control aspect. In baseball you have 5 years to call up a player from the time he was drafted, then you have 6/7 years of team control, with the first 3 at league minimum and the last 3 determined through arbitration. This means that teams oftentimes wait longer in order to maximize the years of his prime under team control.
Hockey doesn't work the same way, you get 2 slide years before the 3 year ELC starts counting at which point they become an RFA. I would argue that it is beneficial for the teams to get through the ELC years of high end prospects earlier, so they can sign a long term deals before they are finished developing. I like to look at Pastrnak as a great example. He joined the Bruins at 18 and did most of his developing with the big league team, by his 3rd season he had just begun to break out and the Bruins were able to sign him to a very team friendly deal. Now they have a guy scoring .7 GPG on a 6.6 AAV deal.