That's debatable. Once I got used to it, it started feeling like ffxiv has always felt. Usually, we don't say about facts that they are debatable. It's not harder, it is however more dynamic and engaging.
There's nothing to "diagnose" about dawntrail's difficulty, it's fine. It's still easier than the game has been for the majority of its lifespan.
Also I don't think this will turn back, because Dawntrail's difficulty is a slight "turning back" moment. Would really send a poor message if they turned back again.
People just need to get used to it, understand that we are all playing with lower ilvl difference to content than we used to in Endwalker, because we don't have 2000 options to gear, and stop letting people who say Dawntrail is hard influence them.
Like, there's evolution and changes every expansion, and there's people complaining about that sort of stuff every new expansion, cause it's jarring to be clearing content with ease because you are overgeared and then suddenly getting into content where you're not anymore.
This discussion is getting so tired, I'm not sure why we need yet another post. ;o;