I think this problem might be much worse than it at first appears. I've trained a new NPC, and the higher her rank, the less effective she becomes.
But worse, I've noticed that it's not just NPCs; thargoids, too, have lost their mojo. Multiple people on AXI have reported that interceptors refuse to fire when players are moving over a certain speed. Just now, I sat in my Taipan and rotated around a cloud of 12 scouts at moderate speed; before, they would have shredded me in seconds, but today, they just sat there, staring at me. If I stopped, they would shoot, but as soon as I started to move, they'd get completely confused and refuse to fire.
I think there might be some sort of general bug with NPC aiming. Based on what we've seen with our own NPCs, I suspect it's something like they aren't aiming where they know they should. High-rank NPCs are programmed to only fire when they're on target, but once you start moving, they're NEVER on target, and as such, they always think they're missing(unless the target happens to stop moving), and therefore, they just never, ever fire.
This is quite possibly also why the turreted AX missiles miss all the time. They're not aiming in the right place.
I really hope I'm wrong, but I'm seriously suspecting that something is very broken in there.