The Academy is a hub and a large enough area for level 1-20 content. 21+ would be surrounding towns and fields, with the further out being more difficult content.
We know of the races and "traits". We can have Archetypes or Specialties to denote how the player fights: Dust Mastery, Swordsmanship, Brawling, Gunnery, etc.
Like in Granado Espada, we can control multiple fully-customized characters at once. In this game, it would be 4 - with a chosen Leader.
We can "suggest" certain weapon designs which the team should be able to implement into the game, in addition to the ones we already know of.
Implementing QTE will allow for more cinematic gameplay.
So yes, we know enough. The only difficulty we'd have would be weapon implementation, but we know it isn't difficult for the team to envision how such weapons work in battle.
Ooooh! We live in the Highlands with our kilts in the wind! We're the Tartan Army, come join us, my friend! We look so dandy, jolly, and bloody right! We wear tartan because of our Tartan Pride!