I wish to devs would do something like how pre/post searing in GW1 is handled. As the character progresses in the story that character changes what version of the maps they have access to. A good example is Lion’s Arch. If you haven’t done the Scarlet event or reviewed the stuff about it from the NPC then you would get the old Lion’s Arch, if you have you get the destroyed LA until you talk to a NPC that explains the rebuilding of LA then you get the new one. That NPC could say to the player that when you come back to LA it will be rebuilt.
Having defeated Zhaitan with one of my characters in the game I wish the affected maps would change to reflect the defeat of Zhaitan and it’s aftermath on those maps as a power vacuum causes other to rush in and fill the void (kind of like Iraq in a way). It would give the player a sense of time progression in the game after completing stories with each character.