I have a theory that the reason they seem to do crossover weapons for the tanks (the samurai sword [whose name escapes me] for the DRK; the 'cricket bat' for the PLD, and so on) is to entice people to play those classes more. I, too, would like to see more diversity in weapons - particularly a big broadsword for warriors (because... why not), and a mace for paladins (because YES), but some regular swords for Samurai would be okay, too.

The problem is, I think they - unsurprisingly - hold the Samurai as kind of a culturally sacred class, and thus may be reluctant to meddle with its aesthetic too much. You're right - Endwalker will definitely tell us more.