I just got out of The Burn. Had a *really* good team, too. Well, not "good" as in "we cleared it first try" (it actually took us about a dozen tries) but "good" as in "they were very optimistic, helpful, and supportive". I have to say that's a rare occurrence these days. On the flip side, though, that is a dungeon I don't really want to do again. That dragon was painful.
If you thought The Burn was hard, wait till you get to Shadowbringers.
I've seen a lot more people mess up in Shb's dungeons, then all the other dungeons combined.
2.0 amdapor keep with bees and Aurum Vale with scholar.
Yes, 2.0 Amdapor Keep was the only difficult dungeon in FF14, especially the Demon Wall and the last boss. Sadly, that dungeon has been nerfed twice.
New dungeons nowadays basically walk in the park.