They explicitly say that you don’t need other expansions, if you only want to play with those weapons. But it will NOT unlock the elite specialization. So: you want a long bow core guardian with only core game and new expansion? You can.

Hmm. Maybe that is exactly what it means and they just get rid of all requirements except having the build traits when you play with a class and unlock the Weaponmaster training.

Dunno if that will be accountwide like a mastery or if you have to play through it with every character. I think it is the former but the way they made the jade bot im not sure.