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The normal trials and raids already IS easy mode, if you can't handle that then the game just isn't for you. I don't want the devs diverting resources to develop a mode that contains even more hand holding and potentially taking away from actual content that we could've gotten instead.
Anything in the story that is remotely difficult (few and far between) either already has or will get nerfed into the ground anyway (see Steps of Faith, Garuda normal, etc).
Some solo instances can be difficult but they eventually give you up to 100% echo if you fail them enough times, and at that point they usually become a breeze.