Hard to restore a restaurant when it's third party. Walt got that. That's why he wanted to control EVERYTHING at Disney.
As for anything at DTD becoming a premiere dining destination, I don't see it happening. Sand Lake Road has too much of a head start, and its restaurants don't have to walk the line between being a true gourmet experience and catering to kids and tourists from Podunk on the dining plan who will eat nothing besides a burger or maybe a well-done steak. V&A and a couple others in the hotels have managed to do it (and, I would note, V&A bans kids), but the idea of six or eight 4 and 5-star restaurants surviving between a giant Disney store and the AMC was doomed to fail even before the economy tanked.
Admittedly, similar factors seriously wounded PI as a nightlife destination--tearing down the gates was the beginning of the end, no one wants to have to fight a parade of strollers to get their drink on. The best we can probably hope for is a seamless extension of the Marketplace; I don't know that anything else works in that space as it is currently configured.