No doubt at all.

It contains lots and lots of challenges.

I think some people just do not know where to find the challenges, or understand what a challenge really means?

Some example challenges:
  • Defeat Iffy with only one WHM
  • Defeat Moogle without relying on Archers
  • Defeat HNM with a party of 4
  • Gather basic strong hold coffers solo!
  • Defeat enemies 10-20 levels higher solo
  • Defeat enemies 20-30 levels higher with parties
  • Find optimal equipment to maximize damage/healing/enfeebling rates
  • Take on an enemy solo/duo that parties of 8 would shudder to attack

When you can walk home from the battlefield, draped in the spoils of war from defeating by yourself or with a good friend an enemy that mere citizens would fear to attack in a party of 8... then you will be hailed as having met the challenge. Then you can say you have done all that can be done.

Until then, there is a LOT of work left, and a LOT of challenges to be overcome.