Forcing NA Duty Finder to be better, we need a grading system.

[MihaelB]

You have forgotten the part that this system can also be abused as well.

Expect there to be players who would rate players as low rank not for their skill but because they want the lol or personal issues with the person.

A person can perform exceptional and have a great positive personailty but get rated a F rank by another player who is a "elitist" jerk but remained completely silent through the run to avoid revealing their "elitist" personality.

The system would calculate your rank, the players won't. It'd be calculated via various stats such as healing done, damage done, overheal percent, etc.