Nobody watches individual players in isolation enough to accurately analyze them.
Your "eye test" is entirely reputation. ...
Okay, I know this will make some jealous but ...
I was born w/ independent ocular muscles that is, the ability to focus each eye on separate sights (sorta like how opposing thumbs work but w/ your eyeballs); so I can "scout" two skaters at once. My game reports to the VP in charge of scouting have twice as many players.
Full disclosure - I'm not actually a team scout and none of my faxes to HQ have ever been acknowledged, let alone responded to, but I am kinda proud of the work put in.
Also, in all candor too, I should say, I've been asked to vacate numerous rinks b/c people think a guy whose eyeballs are wobbling about like mine do looks goofy but ... those who can, do & those who can't, call security.