Actually there was a slate of PvP balance stuff that was on test about a year or so ago. Regarding healing potions, special abilities and stuff like that.
One of those special abilities was disarm which did almost exactly as was described above with reducing the chance to disarm a target that had been recently disarmed.
Players complained quite a bit and so most of those balances were yanked (including the disarm one).
This is not to say that something else may not be proposed later to address those issues.