If you dont want to unbind your D try not use it as much as it can get you into bad habits which can get you punished for it, unbinding at first is a good idea cuz you'l get used to hakus normals, playstyle etc more, then try to use D in the right situations eg when you know there not expecting it or to close out round with D shippu. ( I also am sometimes guilty of mashing D, but dont do so as much anymore so I suggest unbind at first as well) It is a great tool if used correctly.