I know the Nightborne get their beautiful bodies back when they are cured by their addiction, and I know there isn't any chance that Blizzard will make the change now that they've announced their plans for allied races, so this thread isn't much more than a whine thread, but I really believe it would have been way better if that weren't the case. The way Blizzard ended up handling the Nightborne kind of felt like the Nightborne suffered no real consequences of their addiction to the Nightwell. Some random druid and some adventurers showed up and solved all of their problems for them. Life doesn't work like that, let alone recovering from addiction.
First of all, they look way more distinct from the Night Elves than the Nightborne currently do. Second, they look much more like a Horde race, and actually look like they could be 'bad guys'. Finally, the fact that their bodies are still partially withered, despite being cured of their addiction, would be a constant reminder of the fate that befell their race. It would also make more sense for the Nightfallen to join the Horde, as the healthy Nightborne civilization would likely reject their reassimilation due to typical Elven xenophobia (and the awkwardness of hanging around people they once exiled), forcing the Nightfallen to seek allies for survival. The Blood Elves, sympathetic to their suffering from magical addiction, would have helped them out. While the Alliance chooses not to trust them, in the same way one would have difficulty trusting a recovering addict around their valuable goods.
In addition, they would not be able to be Warriors like the Nightborne can, because they obviously lack the physical strength to swing a sword. Alternatively, it could be written in that Withered who are cured by their addiction recover to Nightfallen, but never back to healthy Nightborne.