All your points are dead on but 3 is my biggest issue with endgame. While running Castrum we had SCH who was new nobody took the time to explain anything to him. He died on the second boss and nobody raised him they kept going it was a WTF moment for me lol. I was the off tank so I stuck with him while the party ran ahead and ended up wiping at livia cuz they all rushed in. Too many people forget where they came from and that they were new to these dungeons.