Don't disagree, but I would warn Beth to be careful with the Obsidian model. Admittedly, the Obsidian model contained more depth of choices and, even to a degree, more depth to the NPCs and Companions, but, IMO it also washed out any true motivational depth for those of us who prefer to play a relatively "good" or "moral" character. IMO FNV was all about being horrible in most things. Sure you were nice to the towns and they often came to adore you, but the morality of the major factions was so reprehensible 99% of the time and the actual main quest so absolutely unnecessary to your character that, for me it made the game almost unplayable as an RPG.
I guess I just need a purpose. A "Why?" if you will. I found myself not really caring about Hoover and the motivations of all of the factions was so muddy, not to mention that their behavior was questionable, if not outright idiotic most of the time (honestly NPC, you can't handle some ants? Really Caesar? You honestly think that slavery, wanton slaughter and terrorism is the way to make friends? And so many other examples).
If Beth could add depth to their story and add the moral depth of choices that Obsidian, admittedly, did very well and still maintain a clear main story line that had some relevance, I say go for it.
I love Beth and they, IMO have always been very good at actually writing a story in the TES games, a motivation, if you will, but, a weakness I have found in all of the Fallout games is the moral ambiguity of the main storylines. There is no way to actually come up with an ending that actually doesn't involve wanton slaughter and genocide.
That's just my interpretation. I realize that you're not expected to "Save the World" as you are in many TES games, but... then again..., yes you are. In F3, you were expected to save the Capitol Wasteland from itself.
My only real criticism of F4 is that there is no end game that is satisfying. All those settlements don't really mean anything if you're still at war. There is no real solution to the Sups. There will always be monsters. Either the BoS or the Institute have to go down (or both).
Beth: I admire the effort, but I do have to agree that, while you engaged those of us that are fans of your series, perhaps you did go a bit to far in watering down the moral equivalencies of the storyline to appeal to a broader audience. You can do both you know. Good writing and good action are not necessarily mutually exclusive.