i don't think that's so in today's hockey,
gm's are not scared to draft under sized players anymore in the first round
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well that's how i see it anyways.
While I agree that smaller players are becoming more accepted, I don't think it's necessarily reflected in their draft position. I don't think (and am open to correction) that there has been a single player of under 5'10" drafted in the first round for the past two-plus years. The most noteworthy short guys I can think of in NHL organizations right now (not necessarily at the NHL level yet, since this is concerning recent draft history):
Tyler Johnson (2008?, correct me if wrong): UFA Signing by Tampa
Tyler Ennis (2009): 1st round by Buffalo
Rocco Grimaldi (2011): 2nd round by Florida
Johnny Gaudreau (2011): 4th round by Calgary
Sergei Tolchinsky (2013): UFA signing by Carolina
Joe Hicketts (2014): UFA signing by Detroit
Dmytro Timashov (5th round by MTL) may have been 5'9" his draft year but is listed at 5'10" now. Ditto for Jeremy Bracco, although you can say what you want about guys tending to embellish since the psychological difference of one inch cannot be understated.
Honorable mention to 5'8" and 2014 eligible Vladimir Tkachev, who probably would have been signed by the Oilers were it not for an issue with his status as a Russian who had played in a foreign pro league within the past year or something to that effect. The exact situation escapes me.
Also to Dante Salituro and Rihards Bukarts, who have previously gone undrafted and could go this year.
Going back further, there's Nathan Gerbe (5th round by Carolina) and David Desharnais (another UFA), but the pattern seems pretty cut and dry. With a couple outliers, teams are willing to gamble that those players will be available later for less investment.
So while I think Debrincat and his fellow small stars Clayton Keller and Vitaly Abramov deserve to go in the 1st round, history doesn't support them actually going there. I'd still rank them as among the top prospects available though, but saying a guy is good and predicting where he will go are not always so aligned.