Five to six seconds? Lemme tell you about my first death. I was playing a Ranger and I got bumrushed by four drunk Seekers in a barroom brawl that lasted half a second (one of them rolled a 20 on his FIRST HIT D:<), not long enough for the script to bring in the Seekers' commander to stop the fight and save my sorry ass from triggering. Now, I'm not familiar with the battle system they use in this game and I frankly don't care, but if they utilized some sort of standard battle system that made a lick of sense, they'd at very least have circumstance penalties applied for being completely plastered, and therefore unable to hit the broad side of a barn even if they were standing inside of it.
That, right there, seems to me like a circumstance that justifies complaining about a broken battle system. Why do arrows follow you? Auto-targeting. It's why you don't have to actually AIM. It's assumed by the battle system that you've got perfect aim, and barring anything getting in the way of your shot, it's going to hit. Even if your target sidesteps, autotargeting will make the shot hit no matter what (try firing arrows at evading wyverns for an example of just how utterly absurd an extreme this can be taken to).
I'd say the only way you will be able to avoid getting hit by an arrow is to put something between you and the arrow in the fraction of a second between the arrow being fired and the arrow hitting you. It's much easier with magic missiles cuz, obviously, they travel a lot slower. Arrows, in this context, are the medieval equivalent of bullets, so chances are you will NOT be dodging them anytime soon.
