I have explored this new content area thoroughly and also noticed this. The whole archipelago looks very nice (like the rest of Corinth). I explored all the small islands and also noticed the following things
A couple of locations which buildings that look like camp Icarus. The buildings are empty and contain no terminals. Some are infested with low level berycled.
Some Islands have circular buildings on them that take up most of the island. Originally I thought they were houses but there seems to be no entrance to them and no estate terminal either
When you go near these Island s you usually pick up a new land area, so I am wondering if they may have a function later on. I certainly hope so as its nice to explore new areas but if they have no useful content there is not much point going back after the initial look