The interesting thing to me is how this will influence economy. With gear becoming bound to you after wearing it in battle a single time, this takes emphasis away from simply mass-producing gear for people to blow up through melding and places emphasis on primarily selling HQ equipment for a few extra stats/epeen, and/or converting that equipment into materia. Incidentally this makes shopping and upgrading more streamlined and painless, as well as largely simplifying the money-making process. That's a good thing considering we still have to use the market wards, rather than getting an auction house.
The only downside really is that it will make it just a little bit harder for crafters to find a niche to settle down into for profit. That's not to say it will be impossible, just slightly less opportunity for it than before.