I'm hoping that when they complete the texture updates for the character models for 7.0 it also involves rebuilding the character customisation system from the ground up so that new options can be added more easily. That'd future proof the game more.

They're already well aware that glamour, minions and mounts are extremely potent carrots on a stick to dangle before players as incentives. They could do the same thing with special customisation options - such as adding more facial hair options for male characters, things like tattoos (both the regular sort and glowing, runic tattoos) and also scars.