Exactly , I am a Death Knight.
I have tried getting it on my mage and lock , and yey , got it , cant trade it to my DK, so what I did , I made a lock on my 2nd account , pulled it to my DK , and killed the boss , and yeey , a dagger dropped , so fun , lets wait another week to do this again for another dagger =.=
Its pretty annoying to make my DK follow the lock , where sometimes I get stuck and stuff , it probably is the only way of getting Gorehowl on a non[warr,mage,lock] but still I doubt that the chance of it dropping remains the same , it still needs to be fixed , its not even that big of a deal , just make the door open-able or something .