Not only that, this is a final fantasy game, so we don't get graded. If it's difficult we grind and overlevel by 30 levels than we go and solo extremes and savage content 8 years later... Roftlol
On a more serious note your completely right, whoever needs or wants to be graded already can, people that are not interested don't need precious development time wasted on a grading system, it makes no sense whatsoever.

Yes you are also right, although the figures have now changed with the influx of new players, independently where they came from, the hardcore community represented 1% to 3% of the playerbase, this was acknowledged in one of the live letters.
Yoshi P will make some hardcore content for that group of players that want it, but 95% of the game is built for the casuals, it's a theme park mmo with a heavy focus on story element and it carries the final fantasy torch and all that comes with that.

Yes you are also correct glamour is the true endgame, we already have an built in parser for that called fashion report that you can try 4 times a week to get the maximum grade... This is the hardcore content you'll have on a final fantasy game.