If SE built a parser of sorts into the game that measured / gave feedback to players with even something as simple as low/average/high ratings then sure, I could see it being not too horrible.

However you people want to judge what is good and what sucks by a criteria set by a 3rd party addon that only a small fraction of the game uses and it would not become overwhelmingly adopted if they did allow it. (Most of you that would use them if they were allowed use them now anyway).

If it were built in the game, everyone would be on the same playing field.

As an addon, it's elitest crap and the people using it telling the rest of the game if they're good enough.

Parsers haven't even been in FFXIV that long yet somehow people have been finishing end game content this whole time. How does that make them "Needed"?

Maybe a better suggestion for you all is to ask them to put one into the game rather than allow 3rd party ones. That is the only way I could see them doing any good.