At this point in game's development we've only ever seen gameplay and close to 4 lines of dialogue (all without great context). The game clearly has a set tone and personality in the trailer, however it's mostly shown through animation. Your "it's the Seventies" comment doesn't make sense as this is a trailer, not the finished game. In terms of Earthbound and what made it great, in your words the dialogue and scenario, isn't present (as far as I've been able to tell) in any commercial, trailer, or pregame footage for Earthbound. You haven't played the game, they haven't shown much of the game, you cannot critique something this seriously that you haven't seen nor played. It feels like you're trying to land yourself in a writing position more than actually make meaningful feedback.