Well it is understandable that FNV would not be a radical departure from what Fallout 3 did. (it would not suddenly be like Fallout 1 and 2 again but now in a full 3D engine)
Why the reluctance?
Not relunctant, just the emotion of launching a new fallout game, I thought before that steam would never let New Vegas be sold on GOG and I can't stand steam for forcing people to use a online client, without any real offline installers like GOG provide. (The day I register on steam will mean I died and that someone usurped my idendity)
Other than that I started a game, the engine seem ok, kind of remind me a little of mascarade bloodlines troika game in the shooting part, and I got to use a speech skill already. I just hope the game don't expect me to run around in the wasterland for the sole purpose of exploring if there is no worldmap like in the original games. The only modern game of this open type I played is the witcher 3, and I explored almost nothing, even ignored or sent to hell a good chunck of quests for roleplay and realism purposes. Fortunatly the interface seem fluid enough and there are quests markers so far in New Vegas, it's not a bad idea with a engine like this.
For the pure 'betesda' 3, I actually read on the game, I don't think it would make the cut for what I expect from a game. Modern open worlds in general, there are just not my thing. I made a exception for the witcher 3 as a fan of the books, and to know the end of CDPR fan fiction continuation of the wild hunt story arc. I disgress here, sorry, it's just that I truly believe that the witcher 3 is a good example of why open worlds actually eat too much on the story telling of a game. But I don't wish to debate it, too long and unproductive, as it already were when the game was annonced as a open world and that the crowds were already drawling at the idea of a 'witcher simulator', while it made and still make no sense to play 'Geralt' that way. (Or rather the CDPR version of 'Geralt', sometimes turned into a horrid cliche for the same reason that the third game was a open world, attract the unfamous large audience, but I better not get started on that)
Sorry about the disgress. I am making a other exception for a new Fallout game, and since we speak of a generic character to play like in the originals, there is fortunatly no risk for me to wonder if the main character is really cured from amnesia or why I wonder if he is not a pale imitation of who he is supposed to be.