It seems that
1, each player has a fleet of 3 ships, you can swap to another ship once the current one is sunk?
2, aircrafts are in groups of 3?
3, deck and belt armor work like bulge now, absorb a certain amount of damage and then gone?
4, auto FCS has acceptable spread?
5, large and small caliber guns have almost the same range?
6, park ship near neutral bases to launch landing forces to capture them?