It's still ridiculous. I might understand if it was only for inter-House disputes, but it's not. Anyone can hire the Morag Tong and order them to kill anyone they want. I can just picture the scene:
"Hey, you! Sign over your house and all your possessions to me, right now!"
"What? No!"
"If you don't, I'll get the Morag Tong to kill you!"
"Oh, shit! Okay, here you go!"