Yeah I think almost everything along the Risen Road is above the level we're able to reach in EA but have Larian indicated how the map will work? Is it open world of self contained maps, or do we not know that yet?
I understand that ACT I will be contained away from Act's II -IV - so you have to make some choices in ACT I and you don't return to that area after the fact.
However, everything is subject to change, but I think past the moonrise towers it will be hard to return to the earlier areas.
