I think that there needs to be a new tech called sonar. Thus, only ships that are enhanced with this tech would be able to spot a sub at all
I kinda like this idea.Although one could argue it is allready in civ2 with Steel and cruisers.The sub is under done in civ2.No doubt about that.Not enough moves without Magellans and cruise misslies are a tad expensive.I always wanted a cheap torpedo unit.
As noted,sea control is not important or neccessary in civ2.vs the ai anyway.Perhaps this will be improved in Civ3 but I don't see how.The map you get really dictates how important ships will be.But mostly it is cargo vessels.Ship chaining really eliminates the need for any escort vessels.
Our best hope is an improved AI that will use units correctly and "intelligently".Then maybe Popeye will return.