Let's use the 2012, 2013, and 2014 NHL entry drafts as examples. Let's look at forwards who have cemented themselves as top-6, or men as top-4.
2012 2nd round: Zero e
2013 2nd round: Zero. Lehkonen has had the best career, and De La Rose is 2nd.
2014 2nd round: Zero.
Fact is that great players are now much less likely to be drafted in the latter rounds. Let's contrast to the previous decade:
2002 2nd round: Duncan Keith
2003 2nd round: Loui Eriksson, Patrice Bergeron, Matt Carle, Shea Weber, David Backes
2004 2nd round: Brandon Dubinsky, Alex Goligoski, David Kreijci
Drafting is a lot more efficient than it used to be, and thus it's harder to find good players at the very first round. I'm surprised that this even needs to be explained.
If the claim is 'the 3 years sampled had underwhelming 2nd rounds' - then, sure. But your post hardly confirms that it is getting harder to draft 'great players' in the latter rounds, and merely that you found the 2nd rounds in the 3 years sampled to be particularly underwhelming.
And that might even be true - though I'd consider players like 2014's Dvorak and Montour as bonafide Top-6/4 players; as well as 2012's Tierney and Severson. But again, all that you have proven is that these were subpar 2nd rounds.
IE: you've ignored that later on in those drafts, the following players were drafted:
2012: Gostisbehere, Esa Lindell, Parayko, (Matt Murray, F. Andersen, Hellebuyck), Slavin, Colin Miller, Kerfoot, as well as some 'arguable' players like Josh Anderson, Connor Brown, Grzelcyk, and Vesey.
2013: Brett Pesce, Buchnevich, Bjorkstrand, Will Butcher, Jake Guentzel, Mattias Janmark
2014: Point, Arvidsson, Heinen, Kevin Labanc, Ondrej Kase; expecting more to crop up in the next 2 years as these guys are mostly U23's...
Seems you've also used a bit of a convenient time frame in your sample, as well. 2015's 2nd round has already yielded Aho, Fischer, and Vince Dunn; 2016's Debrincat and Girard. And going 2 years back from the start of your sample, 2010 saw Faulk, Toffoli, and Zucker all picked in the 2nd. In 2011 we saw Kucherov, Saad, William Karlsson, and to an extent, V. Rask and Jenner, satisfy your criteria.
Not to mention the following, all marquee, 60+ pt players drafted outside the top round, post 2010:
- Johnny Ham and Cheese
- Kucherov
- Aho
- Gourde
- W. Karlsson
- Trocheck
- Klingberg
- Mark Stone
So, if there's any definitive statement about drafting outside of the 1st today, it's that it's either
the same or
easier than it has proven to be in the past. And that is thanks to a host of other factors that we don't need to get into.