I'd be ok for immersion but they are going to need a better way of doing it than running through a room full of mindless drones looking for the one who sells the item you want.

PSU had a some-what interesting system kinda similar to XIV now that I'm thinking about it. You would search for the item (or item type, I don't remember) and it would take you to a players house. There you can browse their personal shop as well as their house and see all their furniture.

I wouldn't mind something like this, especially since it would mean we get mog houses back. Plus, decorating your mog house would be THAT much better because you could actually show it off.