I think one reason why they're doing vague dialogue is because there are 4 characters right now, potentially up to 10 by the final version, each of which are going to have their own history and personality. Plus there's also generic characters with no specific history and personality.
Writing each and every dialogue option in 4 different ways to match specific characters would be a lot of work, never mind 10-11 different ways.
Writing one specific generic response to try to cover all possible characters would just serve to make that character (all characters) seem more generic.
