Not to say you're wrong to have your opinion but just wanted to be a counter weight and say I would prefer that everything in the world responds to 'my' actions. Honestly don't care what you do, though I'm happy if you've fun doing it lol. I like people in the game in so much that they're fun to interact and fight things against with but at no point is any particular person 'canon' to my world except myself. We're all our own sort of WoL as the lore puts it, you're all nice and helpful but "I'm the WoL" lol (a point the lore team went over before). Obviously just my personal perspective, but wanted to say I prefer when it's my actions that trigger something, this type of perspective going beyond growth and story but also features- which would be why I just look at the housing system in a theme park mmo and go '...... y tho'.
I think it's cool that they've a whole area growing but on a personal level I'd been happier with it to move only at my influence, even if it was built as a server and personal project (such that the personal side could only move as far as the server has progressed as a unit). Ultimately a lot of issues arise because it's going (most likely) to be a housing area though, having a phased destroyed/not destroyed based on status area .. for housing would be a bit weird.. since some one would be like "come to my house in Ishgard" and you'd be like "wot?". Not something that has no potential solutions, but certainly adds a layer of 'weird' if they had a housing district phased to each player's status. Like one solution might just be to be able to go based on invitation and fc status, with a little bit of an echo visual effect for like the first second or two (to suggest that time isn't quite right, even a pop up message when you first enter to say you're peering into a potential future lol).
Anyway, I think it's interesting thing they tried and the game needs to have more than one type of content a person likes, but just wanted to say at least personally I prefer just my personal input to be the catalyst for change. So like the changes to the hub cities in past expansions I liked them because I was playing with them at the time so it felt fine, but I do feel a bit sad that new players wont get to see that growth.. it would have been neat.