I love how no one ever acknowledges my statement of:

When Developers of a game create content, they should ask themselves this question:

"Would the players or myself do this content without any reward at the end?"

If the answer is yes. Add the content.
If the answer is no. Revamp the content to be fun.

What's wrong with asking for 15-30 hour long content that is both fun and challenging?

I did the entire Manderville questline from start to finish in about an hour and a half (a little longer because of afk breaks and such). That was a fun quest. It wasn't challenging, but the rewards were a pet, a dance emote, and a ton of funny cutscenes to watch. That is how you make content.

You make them FUN. Then you assign them a challenge based on the reward. But the FUN comes first.

No one can explain why Atma shouldn't be a fun 15-30 hour challenging questline. They can't. There's no argument for that. Even opponents to the idea of changing it will NOT have the intestinal fortitude to debate my point. Because they know they are in the wrong. They got theirs and want everyone else to suffer. It is only cynicism, selfishness, and spite that motivates their argument.