Nice summery!
I'm not playing this yet, but I do watch plenty of streams & video's about Uboat.
What strikes me from the beginning, and has carried over into this beta, is the floating physics of the uboat.
When it's stationary in - let's say rough seas - it looks like it floats on rails.
In reality, it should be much more rocking up&down and rolling sideways.
And when travelling...again in rougher seas, I miss the pulled-down effect on the stern.
Ie, a vessel's screw(s) have a tendency to keep the stern a bit pulled down, because of their sheer force.
While the bow gets pushed upwards, while riding the waves...and splashing down in every gulf valley.
I miss this behaviour in Uboat.
How do you feel about this?
And...can modders change this behaviour?