Yes and no. In the proper hands, FO:NV expanded the universe in a way that made sense and never lost the feel of the environ. It took what was there and extrapolated out and added to the whole. In incapable, unimaginative hands, Fallout just focused on the main points of the Fallout story. Fallout 3 and 4. It took the cliffs notes of Fallout (combat, vaults, mutants, and ncr) and assembled them into an easily forgettable story, without expanding anything.Fallout is like Star Wars now.
That is to say: Star Wars could be about more than just black and white evil v. good. The failure to move past that keeps Star Wars a boring predictable story repeated over and over. Fallout NV moved past that theme and expanded the world without pissing on what came before it.