I love the torpedo failure mode.
After some testing, I finally started a new career out of St Nazaire in 9/40 with the patch enabled. Set up a perfect shot north of Scotland using impact pistols on a medium freighter. Weather was stormy with 13 m/s winds. Sure enough, both eels go under the target(I use external camera for eye candy purposes).
I love the fact that there is no more mindless setting of the torpedo depth. Now there are other factors to consider in making a torpedo attack.
Later I ran across a coastal tanker. Once I id'd the target, I decided to pass on the shot due to the high seas. It was not worth a eel and I couldn't gun it under due to the high seas.
Any mod that makes you think and act like a real submarine commander is a huge plus.
Keep up the good work h.sie. I'm looking forward to experiencing other aspects of your patch.