Durability is total S8it logic why do you see your game being useful to play to bring it to a blacksmith after a battle and wait 4 day's for the blacksmith to fix it?. I would also like to advice then that your savegame would be unloadable for that duration of time why it's extra difficulty.
some times i would like to see for instance better timers on spells like bird wing why is it only 3 turns out of combat? it should then be like 10 or so. if afraid of exploit in combat just remove buff at combat begin