The only problem I see with this is stuff like darklight gear being used over multiple jobs, because people realistically aren't going to have more than one piece for certain slots, unless the droprate or method of acquiring gear like this is much easier. People are going to have to pull that gear off, swap jobs, then re-equip it. There also hasn't been any mention of whether unique gear can be incorporated into multiple gear sets, but it wouldn't make much sense if the system couldn't handle that, since technically those items aren't sitting in your main inventory.