Can find the original list here: https://www.pensionplanpuppets.com/maple-leafs-prospect-pyramid-mid-season-list/
LW - Elites:
This tier is for the cream of the crop, the true blue chip prospects that you look at without any doubt that they will become future stars. They aren't just playing in the top six or on the top pair, they are the drivers of those lines/pairs. As a goalie, they're no doubt number on starting goalies year in, year out.
Center - Very Goods:
These are your players who may not be perennial all stars, but are very good players. They may have an All Star nod at their peak, but generally will be the solid supporting players in the top six, the top four defensive pairs, or good but not great starting goalie. The Chris Kunitz to Sidney Crosby, the Zach Hyman to Auston Matthew or Connor McDavid.
RW - Good Role Players:
This tier, to me, is about the players who are still good but a clear step down from the others. You can tell they still belong in the NHL, but they'll likely bounce around several teams playing a specific role that ties into their limited strengths. Think Calle Jarnkrok, Max Domi, Travis Dermott, or for goalies your good backups that stick around despite not the best stats.
Defensemen - AHL/NHL Tweeners
These are the players you may see pop up on an NHL roster for a few games every season or so. Some of them may have a small fandom that loudly bangs the table insisting that they're better than X player on the fourth line that they don't like! But they just don't quite have what NHL teams want or need to fill out their roster. They're lacking offensive skill at a high enough level to make them usable in a middle six role, they're not dominant powerplay specialists, and they're not trustworthy enough on defense or a penalty kill.