They are not changing the core of the game because its broken. No one understands it. I barely understand it myself. Since the min/maxing players tend to take over mmo. No one would really use the current system as it was meant to. IE create your own class.

The way gear is set up isn't bad, but was poorly done. Its like they took this Idea from Mabinogi has they have a similar system. It was a you are what you ware. If you want to be a mage you wore a robe, and bought a wand and skills up your magic skills. Wanted to be an archer? you would get light armor and a bow or xbow. The only way this system works is not have classes at all just a character level. But people would complain.

What they could do possible is do what Aion and DCUO did. You learn various styles or some how morphed gear to looks like other gear. Like yiu could say earned a plate armored style you go and select that style and no matter what you ware, you will have that plate style on.