Just gonna squash a few misconceptions I caught while skimming this thread.

Yoshi said they would add a class before 2.0 IF they were ahead of schedule and they had the extra time and workforce to spare. I wouldn't count on it until 2.0 launches.

Yoshi intends to have 1-2 new classes for when 2.0 launches, or shortly after, so it's expected. Arcanist and Muskateer are planned to be added as classes, but they might not be the next ones to be added. Yoshi wants to prioritize adding another magic class (possibly Arcanist or something else) and a pet class (he mentioned liking Summoner a lot) first to even out the balance between melee and magic classes a bit. However, this priority could change depending on how they respond to the last Player's Poll.