I don't disagree with anything you're saying.
I just hope the game is as fun to explore and play in as F3. I don't expect NV quality story telling.
I'm weird about the last gen Fallouts, because unlike most people, I really enjoyed F3s map, especially the subway/sewer system stuff that most other people didn't like.
That's why my favorite mod combines the two games so I get NVs mechanics in F3s map.
As long as the actual gameplay is as entertaining as F3s was to me I'll be happy regardless of probably much else related to the story, like actual challenge, story quality, etc.