Jup. Submarines were used in two roles:
- attacking slowly moving convoys or single transport ships
- surprising Scapa Flow. But it only happened once.
The submarines very rarely could kill warships since they were about two times faster on the surface.
Even the Type XXII sub would be way too slow to catch our cv.
Edit: i would rather like to see battleships, with escort, just like the cv
Since both the Germans and the US were using their subs for interdiction of commerce, it's not surprising that
they would emphasize these roles. There were many notable successes by several different navies against warships
up to and including carriers.
Not saying that subs would be successful in AH, but historically they did do ok against warships.
A few that come to mind off the top of my head:
IJN Taiho CV
HMS Barham BB
USS Indianapolis CA
IJN Kongo BC/Fast battleship
IJN Shinano CV