I'm a fan of armour design myself, so you're in luck with that one. It's always fun to imagine, if this were a game, what sets people might want to find as loot. As for the rest, I've got a good few pages of worldbuilding information which I sometimes wonder if I can ever fit in without having a sudden adventure in the land of the pop-quiz bandits.
For now, a steady trickle of the surface details will have to do.
Anyway, hop on board! We have snacks.