Not so much a new idea but an evolution of existing. The 'cruiseliners' seem wrong to me even unrealistic and they block the view. They are too close to the shore ... unless they've actually run aground. How do the passengers get ashore? either a wharf or maybe some shore landing feature with smaller boats tied up ... and anyway is there really enough for them to do and see when they're here?
Perhaps some more modest expedition cruisers might fit better.

Georgetown and the other 'villages' seem abandoned and do not have a cohesive style, these need to be refined. We have some mammoth medieval castle, viking villages and perhaps southern USA township all on a pretty small group of islands. evolve the viking shacks to simple groupings of fishing shacks and with some being abandoned but all in the Georgetown style perhaps? There must be a functioning town somewhere otherwise you wouldn't have the windfarm ..... this town could be located to include the wharf for the tourists boats and fishing fleet and freight. But fundamentally build the story of historical occupation to current use and the architecture will follow. The 'story' is not there yet.