The names are a bit repetitive with the Melee line of ships: Destroyer > Modern Destroyer > Missile Destroyer > Advanced Destroyer > Adjective Destroyer
is also contemporaneous with the Missile Cruiser.
Using the same descriptor for two units at the same time like that isn't great for clarity or uniqueness.
I have some suggestions for how to change this up:
Destroyer - rename to Torpedo Boat
and change the unit model
currently uses a Wickes-Class destroyer model (American - active from 1918-1946)
predate destroyers as the small, agile combat ship to counterbalance the big gun cruisers and capital ships
In fact, Destroyers were invented to stop torpedo boats; the name "Destroyers" is a shortening of "Torpedo Boat Destroyer", or TPD.
Provides a more elegant transition to Destroyers, and it cuts down on the repetitive naming
side benefit is this also adds a bit of national diversity to the base units. There aren't any Austrian ships in the game yet, and the current Destroyer, modern destroyer, and missile destroyer are all American models.
Rename Modern Destroyer to just Destroyer
With the destroyer replaced with Torpedo boat, the Atomic-Era melee unit can just be called a Destroyer again
Rename the Missile Destroyer to Aegis Combat Ship
Current model is a Ticonderoga-class missile cruiser, it's technically a capital ship, and not a DDG (guided missile destroyer)
The Aegis Combat System (ACS) is an integrated naval weapons system that has been used on 113 ships of 13 different designs and designations from 1981 to the present day
The USS Ticonderoga is the first ship to have used this weapons system, and thus is synonymous with the ACS
Remove the Advanced Destroyer
The Missile Destroyer/ACS is unlocked in information era, and the Advanced Destroyer (AD) is unlocked in the same era, so there are 2 units in this same line in a single era
the AD is really, really late, unlocking on the last tech line. It unlocks after the GDR; I can't imagine how this unit ever gets to be used
Since it's too late to be buildable or usable, and there is already another Naval Melee unit class unlocked in the same era, all the AD does is add clutter, both to the "Destroyer" naming scheme, and to the late era tech tree. I think this mod would be improved by simply trimming this bit of fat.
With those changes, ENW would go from 4 Destroyers to 1.