I don't like the aspect of the idea that all melee and ranged characters now have a chance to have their weapon break mid combat. That is probably actually worse than any of the effects of the current system.
I think that it all boils down to the question: Do you want the game to be completely deterministic where you can carefully plan for each and every situation or do you want the game to throw at you a few nasty surprises (like a weapon breaking in the middle of a fight) which force you to rethink your whole strategy? While I am a strong advocate of the latter, I understand that some people don't like the element of randomness.
