Ok, in terms of decoys I have done the following so far:
Launched anti-torpedo CM's active and passive have had their effectiveness reduced to 30% in terms of attracting torpedos.
Anti-missle countermeasures chaff and flare have had their effectiveness increased to 40%.
You can let me know how to tweak this as you think.
I've also changed the db flags and mission priorites for wakehomers so the AI won't them at properly identified subs. You can still fire them to run deep if you want, to attack subs, either with a snapshot or by reclassifying the target as surface.
I've also implimented all the dicussed parameter stuff with the ADCAP (60 kts) and the UGST (27nm).