Replacement for the crappy Wolf Pack advantage

[B. Andersson, Game Master]

1.  Wolf Packs (revised)
Wolf packs of U-boats prowled the Atlantic, working together to down Allied convoys. The only sure thing about a U-boat was that there always was another nearby.
Your submarines attack on a 3 (4 if you have the Super Submarines development) if there is more than one of them at the start of the combat cycle. When there are less than two submarines at the start of a combat cycle, this ability is lost. Wolf Packs does not improve defending submarines. Enemy destroyers do not affect this National Advantage. The submarines may come from different sea zones, but they must attack the same sea zone.

2.  U-Boat Program
During World War II, 1,162 U-Boats were built, and these U-Boats sank 14,687,231 tons of Allied shipping.
Your submarines now cost 6 IPC's.

3.  Science Program
Tremendous advances were made by German technicians in the field of weapons development, due to the huge amount of resources put into that field.
You may now roll one research die for free each turn.

[B. Andersson, Game Master]

U-Boat Program it is! Or is there any other thoughts of how one can replace or revise the Wolf pack advantage???