The Rogue's escape ability will not go over area of the map with no navmesh.
If I want to teleport the Rogue over a patch of rocks with no navmesh, such as some of the patches in the Dyrford Crossing, the Rogue just runs into them while invisible and ends up at that location.
7:09 Target spell
7:28 You can see the Rogue crash into the rocks
Not sure if that's intended or not, but it would be nice if you could use it to hop over patches of rocks like that.