I was replying to (I even quoted!) Nigel, not you.
What you seem to really fail to realize is that perhaps it's not bugged. Maybe it was simply tweaked to fit our reality gear-wise, which is different from how it was on retail. You might dislike it, you might call it custom content, but it can be nothing more than an adjustment to keep to the spirit of the intention, that city guards are meant to be a menace and a threat, something to keep those inside safe from anything besides a big invading party, instead of just fancy trash mobs.
I'm not saying this can't be changed at some point, just that it seems to have been made for a quite plausible reason in my point of view. Whether it's reason enough to be kept isn't up to me, but I doubt your raging, demanding tone is going to encourage many people to divert their attention from more important stuff to whether you can kill guards by yourself or not.
