Actually, how hard CAN it be? I repeat what I said in my other posts, wolfpacks mean communication with other boats. I still doubt that the germans would be stupid enough to put 10 submerged uboats in a single attack within a 10 mile radius. They'd just collide with eachother. And, in case you've forgot, there are few avenues of approach to a convoy, altough I'd love to see the face of the captain of a destroyer when he picks up 10 contacts waiting for him
. And again, having more subs firing at the same time would be impossible and would break the element of surprise. So... Ok they might be told to wait for you to be in the area before they scare off the convoy
but I don't think having an extra status ("shadow convoy") is hard.
The question is, how hard can it be to have "encounters" between ai ships on the map? Each sub would get a patrol area, like you, ships/convoys come close to it, it decides wether to report or attack, it attacks, "results may vary". And the only way you'd know about it would be through radio messages. Remember the ones in GWX? They sounded nice but they were false, because there were no other uboats! But now each time they'd say "attacked convoy, suffered minor damage, sinked all escorts" you'd rush there to find an unescorted convoy
They'd send real contact and weather reports, just like you do. And this time, your contact reports would also MEAN something.
Now there is a slight possibility that because of the way probability works, the other uboats might fare way better than the actual ones did and you'd end up with 1000 uboats in the atlantic at the end of the war. To help them "die" more historically acurate, the random dice rolls could be helped by forcing them to meet the quota, through the easy to find number of uboats that were lost each month.
Now, how many subs did the germans have in the atlantic at one time?
30?50?100? Falcon 4 had a dynamic campaign with thousands of units fighting in the air/land/sea. So again, how hard CAN it be?