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

[Arrius]

Let's keep it 100, damage meters and parcers don't make players good at what they do, all they do is make you go 'oh, I did good that time' #onwithmylife.
If a person wants to be good at their class they study and do research, they care. Handing them a damage meter or parser isn't going to make the community or playerbase suddenly better. The people you want to play with, or are describing, don't do D/F to raid, they have their own FC, their own trusted players and their own static.

Of course they don't make a player 'good' by itself, it is a information tool for players to analyse their performance. It can make them better if they use the results to change and improve their playstyle.

Beside that, would everyone do the said research about their class in the respective forums/reddit threads like you described, then we wouldn't have this problem in the first place, don't you think?
And don't come with the 'just for fun' thing; doing dungeons is the same as crafting and gathering - You memorize your action patterns, then execute for results. Only that the latter two comes with a personal loss rather than affecting a whole group.

What you guys want is harder content, not pissy content that spoon-feeds and allows for AFK fights. D/F is this. D/F is 2-minute rice.

Just because D/F is '2-Minute Rice', as you say it here, that doesn't mean to be an excuse to slack off on the performance. Getting better with your class benefits all, alone through faster clearing times.

Duty finder requires none of these things, you don't have to try because you'll never see or hear from these people ever again.

And that is one of these reasons, this 'lol who cares right' attitude, which is contributing to the decline in D/F. Guess what the Japanese have regarding your reputation thing : They use a website, where they tag bad people and list them up for others to avoid in dungeons. And they are terrifyingly efficient with this on the whole datacenter.