It would be cool to have new classes like
orc, elf or some other mystical creatures
or higher classes like
mage -> warlock(stronger magic, summoning)
rogue -> assasin( stealth, backstab n stuff)
warrior -> paladin (healing)
This would be great to get after lv 25-30 or 40 after u upgrade the first class. And max lv should be higher. If not now it would be a great stuff for a new update