Moving forward?

Just as a disclaimer this is 75% discussion 25% debate but 100% genuine question. For those of you who prefer dnd to be a story telling device rather than a game what does that look like mechanically? Like say you're making 6e if you get rid overworld travel rules what do you place in its place. If you get rid of xp for milestone how do people know when to level up. When you get rid of the CR system how will you make fair fights and on what metric will decide these fair fights? How will you address the martial caster divide with absolutely no way to reign in the amount slots magic users have. Ect... I'm not saying your way of playing is less than my preference but I do wonder how that works from a mechanical process especially since to me it seems less like a game and more like vibes and an ever so slightly more complex version of pretend story time with other adults.