Well one thing is for sure ( at least I hope so), going from 50-60, I hope Yoshi-P understands that at this point of the game, we don't need " easy content" anymore. Yes, have casual content, but don't go making Dungeons/Primals/easy, yes even the story ones! The Overworld in Heavensward should be kinda scary to go through. Make the normal enemies feel threatening to the point you may need 2-4 people to back you up.

Let 1-50 and 2.1-2.5 for the most part be for the people getting into the game understanding the controls/feel of the game etc. Let everything Heavensward onward have hard content, since at this point of the game, we should know what to do when faced against a hard enemy!