"Homing pigeons" is a good concept, thank you for the suggestion.
On subs and their torps though,
1. The intent was to create new mechanics that would help to shape unique gameplay experience. Halloween-style subs do not work well because they are more like inferior DD with gimmick. They work, but they don't feel right, there is no target observation through the periscope, no suspense and no proper pacing. Subs have a lot of limitations to take into account. Mainly, their torps are their only armament, and yet the capacity is rather small (4-6 from the group at most). We really believe that this class' torps should be somewhat special and have deeper gameplay than Fire & Forget. Our current mechanics is an attempt at such gameplay.
2. Not sure what you mean here, but if it's "do you think it works?" then yes, currently we believe it works as a concept. But we also believe all this submarine related part of the game will require more work, testing, iterating. Please expect updates, we're absolutely not done with subs as they are, and we will take the time to make them work better.
Cheers.