>>715268406
Here's a breakdown by expansion of how many hours of cutscenes there are, it even breaks down the post patch stories too.

Endwalker had the most at 24 hours of cutscenes
Heavensward had the least at 8 hours.
Dawntrail in comparison had 21 hours of cutscenes (base Dawntrail).
As you say, it was dar, far too many for the story they were presenting.
Endwalker earned the time because it was the end of 10 years of stories/ end of an arc. But even then it did feel long and poorly paced in places, but it should have been an exception not the rule for Dawntrail to follow.