Source: Redditor godzilla5549
Essentially, the citadel space underneath the turrets is now completely underwater!
The current underwater citadel plate is 19mm thick, while the updated model is now 25mm thick.
The citadel plate that covers the underwater space underneath the turrets was 57mm thick, and the updated model is now 102mm thick.
The forward citadel deck armor (which is currently at waterline) was 19mm thick, and is now deeply submerged and is 57mm thick.
