The problem here with making purely 'difficult' zones is the fact that XIV isn't intended to cater solely to the demographic that enjoys that kind of content. Because of this the overworld content that everyone can access has been tailored to meet the lowest common skill level possible so that no one feels like there are areas in the world-proper that they can't ever go, and hence the true 'hardcore' content is instanced into raids and such that aren't implicitly required for people to go in to in order to progress.
Personally, I like a challenge of having to pace myself into a particularly difficult section of a zone, working slowly to make sure I only deal with the amount and types of mobs I can handle at a given time and having to pause to evaluate the situation while I recover from the last encounter. Sadly, all too many simply want to saddle up their 'bos and charge through places with a minimum or risk and effort so it's highly unlikely that you'll see difficult spots like this outside of raids, dungeons or the Diadem.