Couple things:

1) Unless something has changed, you don't need to go into that lower area with all the high level mobs. There are land bridges above that will allow you to cross to the South without having to run down into the area with those high level mobs. You just have to look at your map to figure out the path to where you need to go.

2) There are threads on the boards where players complain because there aren't more of these random, high level mobs around. They want traveling to be more dangerous. I agree with you that those random high level mobs that aggro can be really frustrating. But just so you know, there are people who want the opposite. It seems like no matter what SE does, someone is going to complain.