Not reading 15 pages of this. Just responding to the OP.

There is a TED talk about how games can improve us as people by challenging us to try over and over again while revising a strategy and working together. The EX content and Raid content are good examples of things. Fail. Think about the cause. Try again. Fail. Examine what happened. Try again. Repeat until success.

This procedure helps us grow and helps us cooperate and improve analytical skills.

Yes making everything easier might close the gap and make the game more "fun" for some people, but think about what we are loosing.

That sense of accomplishment after hours of hard work, cooperation, analyzing the situation and devising a strategy. And never giving up until you succeed.
These are skills that carry over into the real world. And nothing compares to the sense of accomplishment after that.

Making the game easy not only closes a gap, but it makes it more mindless.

I hope they retain challenging content.