I hated the POTBS system, I never did get my sail design approved. They would reject it with some cookie cutter response and anytime I asked for direct feedback on what was actually wrong they would send the same message
I doubt that it will be the same deal with the special items, they'll work with the devs and since the devs will be doing graphics and stat productions most likely I think it would mostly just come down to item type, function and appearence/name.
It will definetly be interesting to see what items emerge out of neccesity.