I think subs are underestimated…
I like them a lot more than the Cruiser for instance. The extra cost of 6 IPC’s doesn’t make up for the shore bombardment and extra punch.
Now, let’s take a look at their advantages:
-subs are CHEAP! 6 IPC’s for a naval hit is dirt cheap!
-subs are invulnerable to lone enemy aircraft => this allows them to swim around Europe/Pacific avoiding those German/Japanese ftrs.
-subs can’t attack airplanes, and apart from DD’s, other sea units are more expensive than airplanes. As a result, if a fleet has got only 1 DD, it won’t stand a sub attack, because the expensive carriers, cruisers, and battleships will be the first to get hit. This is often underestimated!
-subs have a greater mobility than other fleet units because they can’t be attacked without an enemy DD.
-1 defense is little, even for 6 IPC’s. Don’t count on subs to stand tall against an organized attack.
-subs can’t hit air, but air with DD can hit subs
-subs don’t like a lot of DD’s (a single DD is seldom a problem)
To summarize: I like subs a lot the way they are implemented now. And I think Germany building a sole sub fleet is a viable strategy. If you just don’t let the British navy too close, the subs+air will keep the baltic.