Yes, I'm adding the trainings one at a time. Water, Fire, Aether, and Nether trainings were not in the game originally (you were stuck with your starting element forever), Wind is upcoming in the next 1-2 updates and Earth whenever the earth girl shows up in Badon.
This update is adding a lot of element/weapon specific traits (ex. cryomancy freezes last an additional turn, pyromancy burns are easier to inflict and much stronger, wind spells doing additional damage on multihits, etc) and new abilities (mostly wind/ice/aether) so hopefully there will be a lot more room for fun builds soon!