I don't think I am revealing more than I should when I say that the Ogres like to kill stuff.
A lot of stuff.
As fast as they possibly can...
So we are seeing Ogres up to Myth sized charging through smaller areas that most other players of a similar size would not think twice about visiting. They are able to clear them out fast and move on. Sparkle Orcs, Watching Orc Camp, Haven Dwarves, etc etc nowhere is left unmolested.
But this leaves something of a wasteland behind in their wake for the smaller players or lone wolves than would have relied on those areas to grind. And if the Ogres are busy and on a mission they are not that likely to stop and talk to the smaller players either.
Now I have heard certain lowbie areas like water krougs are not worth the Ogre's visiting, but other even weaker areas are. (Going by the headless corpses lying around)

The idea behind the Ogres and their desire to hunt fast is innovative and interesting, it gives them something to shoot for and keeps them very busy. But seems to be having some side effects...
If you are playing on your own around hero upwards the choices for places to go to grind effectively start to get limited. If they are being cleaned out regularly by bigger players and your not being able to find yourself a nice grinder it is likely going to cause some people to loose interest.