If there's ANYTHING I remember from POTCO, is that standard enemy ships (I.e not Treasure Fleet, Warships, Bounty Hunters) were slow and there were a variety of 'kiting' strategies that exploited their sluggish behavior. I LOVED POTCO sailing, its what I spent the most time doing. Standard enemy ships were slow enough that you could backpedal in front of them as they 'chased' you and turn and do broadside after broadside into their front, or circle behind them and shoot them in the rear. I'm trying not to compare the aggressive enemy ships we have now to the stationary, inaccurate enemies from the initial beta, I'm trying to compare them to my experience in POTCO. They could move and shoot back, though not quite at the pace we have now.
I don't really want the stationary targets from the initial beta sailing back, and I'd even agree that compared to the POTCO sailing days, the enemy AI and its abilities for standard ships could've used a bit of buffing when it came to their speed and reactivity. I acknowledge that the standard sailing enemies in POTCO weren't exactly difficult, but I just personally feel that their sheer aggression, speed, and aggro radius in the current state in my time sailing in Beta is just a bit too much right now, though I hope the Bounty Hunters, Warships, Treasure Fleet etc. are this tough since they are more designed to be a more significant challenge (in my opinion.)
TL;DR I believe that the standard sailing enemies are a bit too aggressive and fast right now, but I would agree that the way they were in very early beta (stationary and inaccurate) was too easy, and maybe even in POTCO as well. Maybe just dial their speed and turning radius back a bit, and adjust the aggro range. All of this is just my opinion though.