Given how often I run places -- to camp, to the ferry, to a quest location, etc -- I don't like the idea of aggro mobs all over the roads. I have no problem dodging the odd antling or roselet, but running places is kind of a pain already, no need to make it even more time consuming.

When I go exploring, I find so many areas that are dangerous and full of aggro mobs, but they are always empty. And many of them would be excellent grind spots. I think if people didn't stick to the same basic camps and routes, there'd be fewer complaints about the lack of aggro (but where people have reason to go is another can of worms, I suppose!).