Post that was made in another thread, but I think applies here.
"The hardcore" (we'll refer to them as such in order to save time) are complaining about too much casual content. And in the past, "the casuals" (also referring them as such to save time) complained about hardcore content such as Ground Kings.
In reality, you're not going to hear the end of it from one side or another.
There will always be SOME amount of complaints from "the hardcore" about the casuals "just being noobs cuz they can't kill K.Behemoth"
And there will always be SOME amount of complaints from "the casuals" about the hardcore "being pampered with all the endgame content, I don't have the time for!"
How to make balance is this. (Please read this, 'cause I actually think there is some valid points in here)
Let's go back to Endgame 75 for a moment. We had events like Ground Kings (hardcore) Einherjar, Salvage, Sea, Sky (mediocre hardcore) Limbus, Dynamis, Nyzul Isle (mediocre casual) and Campaign and Leveling Up (casual)
The problem here is that, the most "hardcore events" yielded the most powerful rewards. And it wasn't even close to comparison. The casuals who were being left out of "hardcore events" were denied a ton of cool equipment. But there IS a solution to this problem.
My solution is this.
Keep events like Ground Kings for the "hardcores", BUT make event's like Abyssea that exists side-by-side for the casuals. All the while you can keep events that are similar to Nyzul Isle and Limbus for the "mediocre" players who enjoy a bit of a challenge, that is also casual at the same time.
But what you do with rewards is this. You make all the rewards from each of these play areas Equal BUT at the same time Different. They will be all Equally powerful, but just have different stats that play differently from each other.
Example: From events that are "Hardcore" you have a Bow that has Ranged Attack with AGI, and from events that are "Casual" you have a Bow that has Ranged Accuracy with STR. (of course this is just a rough example to show the basic idea of what I'm trying to point out)
If this happened. You will still hear complaints from both sides, but not as much as you would if there was no equal catering such as the example given above. "The hardcore" will still complain about "the casuals" being able to get awesome gear from stuff they think isn't very difficult. And "the casuals" will complain about not being able to get awesome gear from stuff they think, requires too much time and effort than they can afford to put into a game.
But the plus side to all this would be, that "the hardcore" will still be able to do "casual content" and experience the game the way they want to AND "the casuals" will be able to be geared enough from doing "the casual events", so that IF they decided to try out a "hardcore event" they would be able to do so.
Hope that wasn't confusing. And let me know what you think of this idea.