I don't agree with this at all. This is actually a strong draft for d-men. There isn't an Ekblad or Doughty in this draft no but there's lots and lots of guys who could be impact defensemen in this draft. Fact of the matter is that a lot of the top defensemen in the NHL today are guys who were drafted outside the top10.
Karlsson, Weber, Subban, Josi, Vlasic, Burns, Giordano, Brodie, Letang, Klingberg, Carlson, Chara, McDonagh are examples of this. Basically most top defensemen aren't high picks.
I think this draft could produce a lot of top4 d-men, probably more than most drafts even. Chychrun, Sergachev, Juolevi, Bean, Fabbro, McAvoy and Dineen are all great prospects that I expect will be solid NHLers for many years. One (or more) of them might even turn into a stud #1D.
Beyond them you have good depth in Hajek, Clague, Girard, Green, Fox, Carlsson and Johansen who I think have a good chance of being bottom4 defensemen in the NHL. I could go on with Stanley, Niemelainen, Lindgren, Krys, Lajoie, Mete, Moverare, Cederholm, Peeke, Day but these guys have a fairly long road to the NHL. Still solid prospects though.
Really, this is a good draft for defensemen. If anything the forward depth is severely lacking. Beyond the top15 or top18 there isn't much. I don't think you'll see many good forwards emerge from the latter part of the 1st round and beyond.