AD&D is not a realistic game, so ...
But I (and some other) won't play a game that is not well balanced.
This implementation of wounding seems not.
Should be has before, that was enough : 1hp during 10 rounds if you don't use healing skills or magic to stop bleeding.
This is already like to be a +10 weapon (if not moderated by fortitude saving throws), that is big ... very big