I like speculation like this. I have a feeling Samurai an Ninja will come to the game, but I doubt they will come before an expansion pack. I could see a new city state w/ a more eastern aesthetic as origin places for them. At least that's how I'd like to see it handled. Right now they don't really match the aesthetic or world of the game's setting currently.

The only problem I see with MRD being Samurai, for example, is a Samurai with an Axe would look kind of silly. Not to mention the base skills wouldn't mesh very well with the class.

Same with Pugilist turning into Ninja. Though I like the idea of a Pugilist based tank, I think it would work best if it kept the flavor of pugilist (i.e. hand to hand to hand fist weapons).

and having a Dark Knight in game that uses 1 handed sword and no shield would leave them really low on stats, given the way the game stats out one handed and 2 handed weapons.

You can't really have a jobs that require weapons which basically aren't in the game currently, it doesn't mesh with the armory system at all.

Game really could use 1 more healing job and 1 more tanking job though. And 2 jobs per class would be great. I just don't know how we could fit another healer into the whole system.