It's not much a prospect as good as Ryan Nugent-Hopkins. I'm sure Nail Yakupov is just as good a prospect. However, at what he does, I'm not sure we will see a prospect as good as Ryan Nugent-Hopkins at playmaking. I think every few years we see a good defenseman who's a great defender and can provide offense. We also get more balanced forwards, better scorers and whatnot. I'm not sure we get as many top playmaking centermen as RNH.
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I'm not even sure RNH is the best playmaker in this draft. Couturier averages a similar assists per game ratio, and that's without forgoing the shooting opportunities RNH does (Couturier scores more goals).
That said, even if the team's did feel he was the best playmaker in this draft, I don't think they make a decision based on that fact alone. Especially since we don't know whether a better playmaking center will be in text year's draft. For example, a guy like Patrick Kane wasn't even rating as a top 15 pick a year before the draft, but then a year later, they are the top pick (and a better playmaker than RNH, as an example). Backstrom was a solid prospect, but wasn't seen as the top guy a year out either. Meanwhile, other draft years have guys like Tavares, Stamkos and Hall come along. I'm sure either team would rather have one of those forward-type prospects than RNH, in a heart beat.