They won't. Cataclysm and Pandaria said to me Blizzard doesn't care about the other cities, and they find it offensive that other people still do. They're trying to kill IF and UC. But unlike Darnassus and Thunderbluff, UC and IF will live on because they're not shitty like those other cities.
While it didn't get the overhaul that Stormwind did, there's a fair few changes Cataclysm brought to IF.