VaranisArano wrote: »From a meta-game perspective, all zones are locked in time. You might as well ask whyPrince Naemon is still alive at the end of Auridon after you've completed Grahtwood and Greenshade in which he's killed and becomes a lichor whywe're still closing dolmens long after we kicked Molag Bal's butt
When you do zones out of order, there's only rare occasions where ZOS updated character dialogue to reflect that. You don't get different quests or major zone changes.
Chronologically, the Imperial City quest precedes the White Gold Tower dungeon and the zone is not updated at the end of the dungeon quest.