Sorry to say, but you are wrong on all four counts. And note that I have completed this game several times over on PS3 and never once received any kind of warning that my weapon was at risk unless I'd skipped a bonfire for some reason. Now I'm playing on PC in pretty much exactly the same way and I'm making it maybe two-thirds to three-quarters of the way to the boss in No-Man's Wharf before the warning comes up. So you can see why I don't think any of your suggestions account for this.
I don't even mind being forced to play with stricter limits as long as they make sense. I never heard of a sword that breaks completely after killing 15-20 enemies. That's just ridiculous. And not particularly fun, as far as gameplay mechanics go.
I don't know what to tell you dude other than that I am playing on PC and don't have the issue. I am normally running high forty's to mid fifties fps while recording too.