Hm, in races, how about something like orcs? Or you know, half-orcs or something (which would necessitate there actually BEING orcs in this world, but there you go). I like the idea of Lizardmen and the Nekojin remind me of the cat folk from FFXI.
For the magey types, what would you think about having Sorcerer and Wizard? (I know, I know, D&D, bad me! But it's still a good setup.) The Sorcerers are the ones who rely on their own natural talents to cast their spells, and the Wizards are the ones who have to rely on scrolls, spellbooks, etc. Written forms, basically. And they can only use them if they have the scrolls, whereas a Sorcerer knows the spells, and does not need scrolls to cast them.
How about adding a Ranger class to complement the Druid? (YAY for the Druids, by the way.I <3 Druids.) Would the Druids have the option to have animal companions, by the way?