I agree completely, but as far as I know there is no practical way to implement this through modding.subs should take much damage when fighting good escorted convois
I'm not so sure about that. The first nuclear powered subs were very noisy, and of course all subs suffer from poor communications. There is really very little precedent to predict how such a confrontation would proceed.when modern or nuclear subs are developed, the should be very deadly
I've already given modern subs an improved naval attack, may be worth it to boost that a little more.
The biggest issue is that because subs in general suffer poor communications compared to surface ships, they really should receive a higher stacking penalty. But only Paradox can do that, which leaves us with two options: Underpower individual subs to have realistically powered large substacks, or power individual subs correctly and suffer overpowered superstacks.