Capcom had made the endgame of Monster Hunter: World Iceborne more challenging than the base game’s in response to feedback from fans.
Talking to Game Informer, executive director and art director Koname Fujioka said “We’ve taken that feedback to heart from players who wanted more difficulty and more challenge and really delivered on that.”
Before you can hit Iceborne’s endgame, you need to have finished Monster Hunter: World’s main story. For those who have not yet reached that milestone, Capcom have included a few features to make getting through the story a little quicker. A streamlined tracking system, for instance, should make discovering monsters a little quicker.
Source: IGN.com Monster Hunter: World Iceborne Will Have a Harder Endgame