Something needs to be done to make both U/U and and crafted gear worth having. Why does there have to be only one single piece of equipment that is "the best"? Why do U/U or crafted gear have to be better? Why not make U/U on par with the "best" base crafted equip and allow melding materia to both? This way, there will be more variety in equipment and not everyone running around in the same setup.
Example: have a crafted armor give +5 to str and another U/U piece give +5 to int for the pugilist (both useful stats), while having same def.