I do believe that adding a purpose to Melo is a good idea. The idea of working to save his brother is somehow realistic when dealing with Yakuzas but even tho the last scene will be rewritten by someone with more talent than me on a deadline I want to keep this idea. It will lead to interresting paths and character development.
Not everybody needs to be a good guy in the game and adding vilains is interresting to me. If you don't like it that's fine but that's my vision of the world I'm making.