Well I guess that's true that it doesn't tell you how good a specific class is when it is given 3 stars for the specific, um... thing .... title, heading, group?
But however it does tell you the general idea of the actual class. Although it is not precise nor in any case near accurate, it is just a generalised image of the class. Say, for example, you want to play a support class, then for someone who does not have access to the other versions of this game, I will look at the class page for help. From here I can see which classes are support type class and then that helps me to figure out what class I may chose to play which in this case is a sorcerer.
Sure, I could look at the skills description of each class to fully understand what class I may want to play, but you know, for someone like me who is too lazy to do things like that, I'd rather just use what I got without doing further research and try each class out during the CBT instead. But in a why this info will still be quite informative even if it only helps a lil.
But yea, thanks Ikki9117 for making it easier to see and compare the classes even if its only a general idea of each class. :3