LWAMI 4 was released as a playable beta back when 1.03 was the current DW version. It's not going to be picked up, but some of the doctrines may work its way into the 3-series, or the 5-series if we decide to switch to that number.

Nobody will tell you the real life behaviour.

I abandoned DW long time ago for different reasons. Also, I played 95% multiplayer games so not much experience vs AI either.

Anyway, I had a good experience in SC.

For me personally the strive for realism can easily become a killer of the fun factor witch (for me) is much more important. I am always a little sceptic when i read that world (realism)... because you'd need the real data and the people that have that information can't share it.

But I want to add my 2 cents anyway:

In SC, the use of the decoys was a matter of
1. good tactical awareness
2. high rectiveness (adrenaline was a great help)
2a. Always be ready to keep the enemy busy with a counterattack (most of the times)
3. correct decoy settings (depth) and type
4. perfect timing when to fire the decoy(s)
5. correct evasive maneuvering (speed / perfect timing in starting the maneuver / correct evasion angle)
6. maintain / regain tactical awareness ASAP

The decoy was there to allow you the bit of extra time, covering your boat, to have you do all that. (A decoy never detonated a torpedo).

In other words, nature of the decoy pretty simple, but requirement to the player were very high to achieve a successfull evasion (decoy as toy lol). You do a single "error" -> you die. "The art of evasion"

The AI can't do that AFAIK, and since we can't access the code and Sonalyst has gone AWOL, it will be some kind of compromise, but not to be found in real data, instead in personal taste...

AFAIK AI can drop CM, change course, and shoot back. It works in most cases.