Shipping ports and and docks that can be connected to railroads and belt logistics.
Shipping time should be adjusted for distance and should be realistically slower than trains.
Shipping logistics that can be set up just like train logistics can.
Ships can be researched and built and everything including quality enhancements including propulsion enhancements for speed and for shipping volumes can also be researched and built. Different ship sizes and classifications such as Frigates, galleons, container ships, etc.
Ships should have a grid like armor and vehicles as well as maritime specific enhancements.
Ships should be able to driven just like tanks and cars and have similar fuel sources as both.
Ships should also have the ability to install tank cannons, missiles and guns so I "soften" enemy positions from the sea. The range of ship weapons should be short enough to require to use within the range of the enemy fire.
Enemy fire could have a stronger damage factor on ships to offset the naval superiority.
A player should be able to make large shipping centers and ships of different sizes should require docks of different sizes.
With this I could set up large scale logistics between distant lands and island maps set ups without building trains or land bridges. I could also sail around and harass biter colonies from the coast like a pirate.

This is my wish list.
Thanks