The new biome, the archipelago, not only has a different geography, but also new constructions with new dynamics. For example, you can connect by ferries instead of bridges. In fact, it will be the only way to cross the sea. You can also build stilt houses in the water.
In addition, you can now have multiple game saves.
Main fixed bugs
Fixed camera dancing bug in certain cases
Mechanics
Can overbuild by pressing alt
Graphics
Water vehicles are now available: Boats, sailboats and ferries
Improved interface when building area constructions (shows up when there are not enough resources)
Resources are now displayed in 10k format instead of 10000
Save and load
There are now several memory slots for saving games.
A special UI for loading games, where biome information, time played and date are displayed
Saved games are no longer sensitive to version change.
Maps
Huge map
Lagoons
Island
Archipelago
New bioma
Archipelago
New buildings (N) means that it is a neighborhoods, so that's ~7 models per type of building)
General buildings
Heavy iron mine
Archipelago buildings
(N) 2 storey fisherman house
Fish warehouse
(N) Colorful stilt house
(N) Wooden stilt house
Seaport
Marina
Thermal bath
Beach
Ferry
Modern ferry
(N) Touristic seaside neighborhood
Promenade
Pier
Investigation
I am not sure, but I think that sometimes lumbercamps destroy nearby roads.