I think, that's a pretty good base. The whole cannon thing we can continue to deliberate on, but as a whole I'd say that's pretty good. I have a couple of questions though,

1.) What's alternate propulsion? magical?

2.) While I see a lot of "up to 15th-16th century" stuff, I assume a lot of the world is at a tech level lower than that, is that right? Like, equipping the bulk of their militaries with... less heavy armor and weapons?