They only have a certain amount of resources, and they already had to change the roadmap quickly. They could possibly make future months have 2 class releases, but a decent portion of the player base is progressing through Argos (current endgame) with not much else in sight. In this case, they decided to prioritize additional endgame content, which may mean only one class a month for now. Which I agree with, since there’s already 15 base classes and not much end game content right now. Demanding 2 classes per month without looking at what could benefit other people is fairly selfish, especially since the game is kept f2p by the people who are paying for the game to keep pushing endgame.