The “Naval Melee” unit class would have the most Movement and would not require Strategic Resource. It would also enjoy from the “Escort Mobility” trait, which grants to units in formation to inherit all escort’s Movement speed. Its updated role is to explore, escort and, later on, protect against Naval Raiders. The new units are:
- Trireme: A new classical era Naval Melee unit unlocked with Shipbuilding. It allows a better bridge from the Galley to the Caravel.
- Modern Destroyer: A new information era Naval Melee unit unlocked with Lasers. It allows the unit line to have a proper end unit. Yeah, the name is really bad.
The “Naval Ranged” unit class would be slower but a deadly naval unit. Its role is to attack, either cities or land units. Should it have Bombard damage instead? The new units are:
- Cog: A new medieval era Naval Ranged unit unlocked with Education. It allows a better bridge from the Quadrireme to the Frigate.
- Dreadnought: The modern Naval Ranged units that replaces the Battleship. It works the same, except it has a new model, so we can use the Battleship as an Oil-based post-WWII unit. Even if a Dreadnought IS just as type of Battleship...
- Battleship: An “new” atomic era Naval Ranged unit unlocked with Rocketry. It allows a better bridge from the Dreadnought to the Missile Cruiser.
The “Naval Raider” unit class would not require Strategic Resource. It would have a significant increase in Ranged Strength, but lower Melee Strength. It also suffers from a penalty from attacking Cities and land units. Its role is to raid the coast and attack other Naval units.
- Torpedo Boat: A new industrial era Naval Raider unit unlocked with Economics. It allows a better bridge from the Privateer to the Submarine.
The "Naval Carrier" could have an ultimate version that would a sort of GDR of the Sea. Something like:
- Nuclear Carrier: A new information era Naval Carrier unit unlocked with Nuclear Fusion. It requires 1000 Production and 3 Uranium as strategic maintenance. It is a 100 Melee Strength unit with 7 Movement. It can carry 4 Air units, but cannot combine into Fleet or Armada. Something like that?
Embarked units could have +1 Movement at Mathematics, but Steam Power would only give +1 Movement instead of 2, so they would not be so sluggish in the early game to cross or even explore. The Melee promotion "Amphibious" could also give +1 or +2 Movement when embarked, and/or +5 or +10 Combat Strength when embarked too.
There are a lot of changes, so they could split it into 2. One around the Naval Melee and its rework, the Naval Carrier, and the Embarkation tweak. The other around the Naval Ranged, the Naval Raider and their rework. Maybe some unique unit should be changed accordingly. The Norwegian Longship could be a Trireme replacement, or the Indonesian Jong could be a Cog replacement.
If there is such a focus on the Naval side, they should also implement new Civilizations, Leaders or Personas linked to that side. Yet… I am running out of ideas. I can see Venice coming back with a Galleass as a Cog replacement, or a warlike Sejong Persona with a Panokseon as a Cog replacement, or the famous Turtle Ship as an earlier Caravel.