Being completely honest, I'd prefer they bring back Set Bonuses. I thought that was a very interesting mechanic for this game and it essentially gave more customization options depending on the bonus. It also would help to flesh out materia melding. Though I could see some gear getting undesirable stats. So as a fail safe, they could add a means to randomly change your set bonus with currency, crafters or even gil. Possibly a low success rate for the crafters to change it, or manuals through your grand company.