Sometimes you just want to KO someone without killing or crippling them, and if they are fighting back and/or wearing armour its next to impossible to do this with ua attacks...
It may break realism slightly but could we get an option to do no/greatly reduced HHP damage with our attacks?
Its quite sad when you kill someone you don't mean to because swords do so much HHP damage, and even if they somehow have enough HHP to survive being KO'd they will be crippled for ages.