All U/U gear can be beaten by melded gear, its what people asked for, everyone said (before materia) that crafting was useless because all U/U gear was better than crafting gear, so SE made materia and double/triple melds > U/U.

It has been the case since materia was released, SE cannot win with this, if they make U/U gear overpowered crafters will complain, if they make crafted gear over powered we get people who like endgame and AF complaining.

Pretty much no balancing will fix this.