What Blake has done so far has been relatively easy. You or I could've traded veterans away for 2nd rounders, picked Byfield or Turcotte in the top 5 or listened to the scouts on the rest of the picks. The hard part is to come, which is icing a winning team. That's not a foregone conclusion just because of the great youth in the organization (see: Edmonton). Whether that happens on schedule is what Blake will be judged by.
I mean you could argue that Ottawa had it pretty easy with their abundance of high quality draft picks this year, and most analysts agree that they crapped the bed on all of their picks after Stutzle and Sanderson.
The fact that Blake has chained together four A-rated drafts in his tenure is impressive, even if most of the credit should go to his scouting staff. They just as easily could have traded away the high round picks or gone off the board (Thomas Hickey anyone?). What's more impressive is the quality finds that they've been able to get outside of the first round. Kaliyev, Fagemo, Grans, Faber, Chromiak, Spence, etc. are all picks that analysts have lauded. Sure, several of these guys might not work out (most later round picks don't), but the fact that they have such an impressive stable of prospects to work with is worthy of recognition.