Well, in addition to what Jina has stated,MMO's generally don't have 40+ classes to choose from. I mean, STS can't even find out how to balance out 3 classes, what makes you think that they will ever add more? Even if they did, this is a mobile game. Max amount of classes would be around 4-6. In PC MMO games, there are such games that have around 12+ classes, and 2 or more subclasses for those 12 classes.