Having a map made entirely of smallish and medium sized islands seems pretty awesome but the biggest issue is how do you handle things like movement between islands? If you can't travel from island X to island Y, you're going to be severely limited.
Also, what about when you get raided, or when people travel or visit? How will travelers get from one side of the map to the other, and how will raiders reach your base? What about the air drop of supplies, what if they land in the water?
For a map like that to work we would first need the ability for colonists to swim from island to island (Perhaps risking hypothermia and sickness in the process), or to build boats or bridges.
Also, what about when you get raided, or when people travel or visit? How will travelers get from one side of the map to the other, and how will raiders reach your base? What about the air drop of supplies, what if they land in the water?
For a map like that to work we would first need the ability for colonists to swim from island to island (Perhaps risking hypothermia and sickness in the process), or to build boats or bridges.