Underwater protection without Jutland

Would submarine losses and low-freeboard problems still be recognized if Jutland never occurred?

Yes; underwater threats would still reveal them, while only Jutland-specific operational lessons would disappear.

Submarine losses and low-freeboard problems would still arise without Jutland. Pressure to improve underwater protection would therefore remain. Battleships are also described as generally better protected underwater than battlecruisers. The missing experience would instead include lessons particular to the fleet battle, especially night fighting.