(Goals/60 + Points/60) * (ES P1/Game) = VALUE
(P1 = Goals + 1st assista)
So the first part of the formula double-favors goals, because both goals/60 and points /60 includes goals. Then it cuts some inflated PP-production off when adding some ES primary points data. There has been articles about these primary points, how they predict future success. And when that ES P1 is counted per game, it cuts some small ice-time flukes away and favors guys who can play big minutes.
Top5 in NHL from last 2 season at same formula, are Pastrnak, Kucherov, Stamkos, McDavid and Draisaitl.
Data is snapped from here:
Pick224 - Hockey Prospect Stats
This is my view of things, based on many advanced stats articles, which will favor primary points production. It just measures and tries to predict pure point production.
EDIT:
Also, it includes the age-adjustment formula, where DY-1 production in OHL is valued ~double vs. DY production. They really double their production on that age range.
So 18,5 old Rossi with 120 point production, means 17,5 Byfield being equal with 60 points !!
It feels unbelieveable, but it really goes that way.