I like this concept as well, and I support it. I hope the development team will check it out, but one thing. Instead of getting the option to choose a class at rank 30, lower it to 25, or even 20. That way the next half of leveling you can be your "actual" class. I love the talent tree idea, if you don't want to copy. Make something unique, do something similar to FFVII's Materia system, but make it tailor more to the MMO market. This is a great suggestion!