The conspiracy theories here...

The reason the scion gear is locked is because they didn't make anything. The NPC wear the scion gear as a full "body" item, like a Chocobo suit. So all they did was make a new item entry and give it's model the one the NPCs use. Since there were no "male" Minfilia models, they didn't bother making a male version.

The only new content was the Lalafell versions.