Dawntrail is harder than EW, that's just a fact.

BUT, it's still doable easily. People need to lift their eyes over the hotkey bar and look at the area, the boss and what he cast.

Of course, failing is ok. It's a matter of fail and retry. But let's be honest. None of the mecanics of Dawntrail inside dungeon are at the level of an extreme or Savage.

People complain about multiple mecanic at once ? We had that since Stormblood, nothing new.

People complain about non-telegraph AoE ? Maybe start looking at what the boss cast or how he move, that could give you a hint.

The boss hit too hard ? You have tools to reduce damage for you or the entire party, read your spell.

I do agree that player who returns after a long time can be rusty, and every player doesn't share the same skill/knowledge. Also, I think that using a skip to reach lvl 90 immediatly is a REALLY BAD IDEA when you know nothing of a MMO.

Also, you can't expect to have the same difficulty inside a dungeon from level 15 to 100. The difficulty HAS to increase at some point.