I wouldn't mind seeing another section added, as surviving vets pass away put their names on the wall, as well. Most who returned were never properly thanked or honored in any way, and most were publicly humiliated, ridiculed and spurned...it is only fitting that their sacrifices be acknowledged.
It is a very humbling memorial...saw it as a kid, with no understanding (at the time) of the sacrifices made by those on the wall, yet was still able to feel its emotional impact.