1st of all, I can tell I've gotten pretty rusty after not playing in over a year... But I've also encountered some things recently that I didn't before...
I recently came upon a convoy which I had trouble tracking & therefore intercepting. I kept getting "closing" & "moving away" messages. Took a little bit for me to realize they were running in a zig-zag pattern. In the past, the convoys I encountered mainly ran a straight line to a way-point.
Finally after intercepting this convoy, I counted 3 troop ships in the formation of merchants. (I don't think I've ever encountered them before... or at least that I remember.) After disposing of the escorts (no easy task --- it was downright nerve wracking) I then noticed some odd behavior (@ least to me) from the troop ships. They fell out of formation & took up the roll of escorts (kind of like bodyguards blocking your way). After I disposed of 2 of them, the 3rd took off ahead of the convoy & left them behind. I don't know if it was just trying to escape or if it was trying to lure me into a chase away from the merchants. Very strange, I thought.
Anyway, I've got a lot of practice to do to get back to where I used to be.