I genuinely don't agree. In about a year we went from being one of the league's worst teams, to a middle of the pack team. And we largely did that by adding three good rookies. Our offense scores enough to win games. Our defense is just terrible. But it's about to see A) a huge influx of homegrown talent, and B) addition by subtraction with guys like DK, Staal, Leddy, and Stecher gone and replaced by better free agents.
You give this same exact team a competent defense and we're in the playoff hunt. Add a legit 2C and Vrana for a full season and you're even better. I'm not saying there's not work left to be done, but I don't see it taking 5 years.