"First, this full-class selection is clearly a hidden gameplay mechanic designed by the officials. But why design classes in the first place? Obviously, to facilitate player learning and transformation!"
"Think about it—if they had opened up all classes, all skills, all talents from the start, players would have definitely been overwhelmed."
"In a typical MMORPG game, by level 10, you'd at most learn just two or three skills, and choose a talent from among the five or six available within three branches. The learning cost is pretty low, and it's easier for newcomers to get started."
"But if you start with full access to all classes, that means players have to choose from fifteen or sixteen skills, and over twenty initial talents. The learning cost would skyrocket, practically driving new players away from the game."