Well, users can view my posts here and make their own decisions:
http://www.subsim.com/radioroom/showthread.php?t=128575
Changes to the player U-boat damage model have other very negative effects. Breaking one thing to fix another is certainly your choice. However, fixing things in this way isn't really a step forward.
The mod you describe will likely function with GWX, but will not be compatible with the damage model balance in GWX.
For these reasons and others we will advise GWX users against employing this modification.