I dont have much trouble with the underwater activities, with some sensible actions one can change the odds, but the surface actions is imho a bit overdone.
When looking to a taskforce, from lets say 3 kilometers thru persicope, fireing a torpedo, quickly lower the thing and dive and go silent...
The destroyers turn to your direction instantly when the torpedo hits.. thats not real. How on earth did they know where the torp came from in the first place?
But I can live with that, but their visuals.. strange thing is sometimes they see me, sometimes not, and not depending on weather.
I feel we need more 'luck', because we need the extra bit further in the war, when things get equal or worse.