More "real" dialog doesn't automatically means simulating exactly how people talk on real life. The Witcher 3 has a overall shit plot but there are many instances of dialog that flow naturaly and express emotion without boring shit talk. One example of the way real people talk that is really missing from PoE are emotions and I find really amusing that the only two characters that carry emotions were written by Avellone maybe with exception of Eder and that is more credit of his voice actor than the text.
On Guilded Vale for example, there are ominous three bell tolls and a huge tree with hanged people, that was a a pretty good indicator that shit was happening in there. The forced tourist guide at the entrance was annoying and made replays inconvenient by forcing you to skip dialog after dialog after dialog of needless explanation, not happy, they took the control of the camera to show how people were scared, a much better solution was for you going to the tavern for any reason and on the way you hear the bell tolls and once you get there, the inn keeper was obviously scared and didn't want to talk about it and everyone you talked got unconfortable and refused to talk raising a question on your head.
There you are, how to make Guilded Valley less boring and less info dumpy. You could discover the lord in there gone crazy one thousand ways and Obsidian just chosen the most boring one.They fucking pretty much gave all the major plot of Guilded Valley right at the start and forced you to waste time on every single replay, call me naive but I don't think even mentally challenged people would miss the fact that a tree full of hanged people is a bad sign. I mean, I think Obsidian gone way, way, way too much on their patronizing of the player on PoE and destroying any mystery on the setting with their info dumps in the process.