It wasn't actually Bethesda that developed it. Obsidian's caliber of plot, RPG options and choices, etc, it is off the charts. Compare New Vegas to any of Bethesda's recent work (Oblivion and onward) and it pales. Obsidian did an outstanding job, much better than Bethesda has done in recent years. It's only crippling aspect were the bugs.
New Vegas - Choices choices choices!
Oblivion-FO3-Skyrim- linear weak plotline where one can choose between two options, if you're lucky.
I believe that Bethesda has lost the meaning of what "RPG" means.