Thanks for all the comments guys! Still lots to be done but here's the latest build.
The lighting has changed to something that is a lot cooler which I believe fits the theme a lot better then the harsh sunlight and long-shadows of the old setup, plus it creates a nice, calm, relaxing atmosphere which is what I'd imagine to be my perfect island.
I've also created a new soundscape. I'll upload a short audio clip of it when I get onto my main PC. It's basically the two high and low desert wind noises combined with random seagull squawks and distant waves crashing in the distance. Hardly groundbreaking but it works very well especially with the calmer lighting and definitely reminds me of the seaside.
You may have noticed a few minor changes to the layout where I've gone around adding cover and generally moving and adding bits and pieces to help improve the flow in some areas. There's not really much to say about the changes as I think playtesting will decide whether the changes are good or bad.
Anyhoo, I hope you like the new changes. I've still got to add a 3D skybox, finish detailing some of the buildings, add blocklights behind those damn displacements, and model a staircase for the lighthouse!