Well, for the first time in about 2 months, I decided to actually play SH5 instead of working on it. So I loaded up all my favorite mods, and a few new ones and headed out on a new campaign. A few hours later, I had not actually found any convoys, but I picked up what seemed like a hunter killer group. I decided to go ahead and attack it just to see how the AI is now that you have worked on it. So, here is my experience:
It was a group of 6 DDs, it was nearing dusk so I sneaked up pretty close to them(had no problems with overly sensitive visual detection), and went to periscope depth. Got a good solution on the closer middle DD and fired a spread of 3 T1s just to make sure I got a hit since I figured they might dodge them. Hit and got a confirmed kill and started diving. They immediately headed my direction, which I would expect since they would have seen the torp trail. I then spent, I don't know how long, trying every evasive maneuver I could, going all the way down to 200m in my VIIa but I was not able to shake them at all. They stayed directly on top of me, however, I barely ever heard a sonar ping(I mean maybe 4 pings the whole time

) I lost count of how many dcs exploded, but I never took one bit of damage.
So, I am kind of confused. Why so little sonar use? I was on silent running, so they would have had to use sonar to know where I was, but they were acting like they could just hear me. Also, I really think the blast radius of the dcs needs to be increased. I might try setting them to the figures I posted yesterday, and trying it out.
Don't get me wrong, they are obviously way smarter than stock, which I am very happy about. But, it seems that they are omniscient when it comes to keeping in contact with you(perhaps the thermal layer could be increased).