My, such a rude child you are.
So tell me, if subs are not the most cost efficient naval unit, what is? Sorry, but I have trouble believing that subs are overpriced and underpowered compared to carriers, battleships, or cruisers.
For the record, I think it would be great if the subs had a greater dive % and were more difficult to spot. However, the subs then MUST have their naval attack rating reduced *substantially* to maintain any sort of balance. Hubert is going to have to decide what role he wants subs to play in SC. They should either be purely offensive naval attack ships (which they already are), or extremely elusive commerce raiding stealth ships, but NOT both.
Does that sound reasonable to you? If not, I'm sorry you had to sit through another one of my insane rants.