MGM's new name is equivalent to them saying that the park is never finished and that it reflects the changing atmosphere... and that Disney is doing their part to bringing the best overall experience to their guests.
DCA's $1billion dollar budget is admitting that they were wrong to be so cheap. But they're still doing their part to bringing the best overall experience to their guests. And besides... they only have a budget and no concrete plans on what the money will be spent on specifically. Which is why no announcement was made.