All things considered, it seems that focusing on U-Boats, as a strategy by Germany, was far more effective then either aircraft carriers or battleships.
If this ship had been launched, it's lifespan probably would have been comparable to that of the Bismark.
"All things considered, it seems that focusing on U-Boats, as a strategy by Germany, was far more effective then either aircraft carriers or battleships." 
That was probably true until late 1943, when sonar and radar were so commonplace on allied surface ships and aircraft as to render U-Boats obsolete.
I'd have to look up the stats but I'm thinking offhand that by early 1944 each U-boat averaged fewer than a single sinking of an enemy ship before being lost.