well ceizak, yorcia are understandable, they are forests, so not every path is layd out (however the sanctuary of zitah is also a forest zone, but done very great, but doesnt feel so packed like yorcia for examples)
the gates are tunnels underground (understandable) and have some small open fields
Marjami is a mix of both and actually looks quiet well
Morimar is now very open field, just looks very wasteland (there is really not much to see there)
Foret is understandable, wildlife + ending of a river etc.
Kamihr drifts on the other hand could have been very well open field, but this one really went overboard with corridors.