I tried v2 again with PQ-17. Totally different result, I was detected early and a DD made a beeline for my location...
However he lost me after his DC run and the other escorts had trouble regaining contact..
unfortunately, there are too many skilled escorts and the water is not deep enough, so my boat was eventually sunk (I miss being invisible
).
I did notice however that the AI has difficulty maintaining contact and was not able to use its usual tactic of planting the "director" right on top of my boat, so it is a step in the right direction.
PQ-17 is too tough though, I will have to work up a more realistic scenario.