They've already talked about Samurai saying that they choose Dark Knight over it. So, if it was out now it would've been a tank, but Yoshi even said that he sees it more as a DPS. For the Ranger, I don't know, it feels much like a Bard without songs XD

That said right now we have 3 tank 3 healers 2 ranged/supporter, 2 casters (and the SMN is a weird hybrid DoT/Pet/AoE class now) and 3 melee. What we need are a non supporter ranged and a caster more than another melee.