Final Fantasy 14's Dawntrail expansion had plenty of issues, but the complexity and difficulty of dungeons and raids was not one of them. After a few years of fairly underwhelming boss fights throughout Endwalker, Yoshi-P and his team came back swinging in Dawntrail, so much so that some people even complained about bosses being too difficult this time around.
In fact, a few developers at Square Enix have been looking back at Endwalker and have admitted that the combat just wasn't quite right. Yoshi-P himself said before the launch of Dawntrail that he regretted making the game less stressful, and now lead battle designer Masaki Nakagawa has admitted the streamlining of Endwalker's bosses was "taken too far".
In an interview with PC Gamer, Nakagawa explains that a lot of the reasons why boss fights in Endwalker were so lackluster were due to a policy of trying not to frustrate melee DPS players with downtime. This is probably the reason why so many boss fights in the MSQ lack positionals, or have any kind of mechanics that stop you from dealing damage.
"Prior to [Dawntrail], our policy of reducing gameplay-related frustrations was sometimes taken too far," says Nakagawa....