I think you really underestimate the sophistication of NHL scouts versus media/fan sources like Hockey Prospect. Mark Edwards has a solid history as a club midget coach and has borrowed his rating 'system' from the Winnipeg Jets (3-9 scale, 3 is poor and 9 is elite). His categories and priorities are also not necessarily unique either as he ranks in order of importance: Compete, Skill, Skating, Physical. Edwards to his credit includes NHL scout opinions on players to augment his own assessments. They are solid in Ontario and Quebec with people able to live view. I enjoy reading RedLine Report with Kyle Woodlief whose worked on an NHL scouting staff.
NHL teams and their paid scouting staff consider their scouting information as proprietary knowledge gleaned through thousands of direct viewings of players, intel from coaches, players and family members. Their priority is to selfishly inform their million dollar decision making to make their teams better - it is not to give interviews or pithy soundbites to outsiders (fans, media etc.) Fanzine draft guides are fun, provide some good fodder beyond the snapshot most fans can access, and generally have a highly variable quality of eyes accessing projects with limited direct viewing opportunities as one might expect with highly limited resources (financial, human, scale, access).
As far as data samples, Central Scouting staff see thousands of live viewing games each year which divvies out to hundreds per staffer and multiply that over multiple years and the sheer volume of live sightings is substantively beyond all fan draft services. Similarly NHL scouts have a massive volume of live viewings each and every year. An interesting to look at this function:
On road with NHL Central Scouting
You don't seem to respect Craig Button whose seen more prospects than you or I will over several lifetimes. He's now a conduit through his TSN employment to bridge the gap between the hard miles that professional scouts put in and our limited access to projecting teenagers. His father set up NHL Central Scouting and early efforts to create a consistent approach to categorize prospects that span the globe. He's in the edutainment business now but the guy's put in the work at all levels of professional scouting and management.
Button's own thoughts on hockey sense? And again, back to the data, this is an attribute that become clearer with the high volume of games viewed by qualified eyes and brains who get paid to make million decisions.
“The prospects that you are really trying to assess are the players that can see what is unfolding really quickly. Then being able to translate it quickly from their head to their hands and make the play—you can call that hockey sense.”
“Without good hockey sense or awareness, your other skills don’t matter, and that’s why so many players that can skate and have elements of skill do not succeed. It’s not because they don’t have the skill, it’s because they don’t have the intelligence.”