I have been fighting flies and when one of my daggers breaks I dont know it right away. Because I dont keep looking over to my inventory every 3 seconds.
So maybe when something breaks a message pops up that says
"You have broken your dagger"
"Your dagger breaks"
We had that proposal a million times now; it will be implemented, but you can now see that your weapon is going to break soon, at least if you are good enough.
i just listen to the fighting music...once the slashing type noises finish i know my weapon has broken because it makes that noise everytime i hit the creature heh