Why would poses be restricted to FF only? Toys are just generic game objects, they can be animated into any pose, regardless of which character is using the toys.
And the toys don't have to be limited to insertables, there's no reason you couldn't throw a Satisfyer or a magic wand in there as well. Heck, there's a whole dungeon of new gear to be explored there... maybe the devs could make some XGold on it by making them purchaseable inventory?