Coustomizing appearance via vanity slits can't come soon enough, and a few more appearance tweaks would be nice.

But as to talent/trait trees... These are always a fool's errand when trying to add coustmization to an MMO. They always get theory-crafted to hell and back and the optimal builds are found, and we're right back to the "cookie cutter problem" again. Even sub jobs in FFXI suffered from this (at least before I quit, if you were a BRD/anything but WHM you may as well have set your search message to. "I have no interest in partying")