Well, we're in "different strokes for different folks" territory here, really. Me? I want the game to go wider, more depth, more stories, out and out, not driven into a point (and this is my opinion rather than me assuming I'm speaking for many) of "I'm a god, give me god stuff". I want to see the game's narrative and plot advance, that's not tied to "I'm level 90(+1) , so I need fights to be THIS hard. Fallout from previous stories, what are the people doing.
I understand where you're coming from, I do. Progression of a sort is desired in games. And having played for instance Cole's Personal Story, It's a great piece of character for him. But surely, if it were your character, you'd want to at least have the chance of being defeated? Else what's the point. Cole's story is effectively a cut scene you get to benefit from but it's still only a cut scene.
Again, in continuing to level and get stronger you're delving into the downside of HC albeit it can't be helped, in that as a volunteer set of devs they literally haven't the team to build out the way you're talking about. Or at least that's my take on it.