I had an idea I thought I should write here.
Moar Areas. Maybe you could add some more interesting areas to the Earthen Realm. A swamp? A graveyard? A Forest? I don't know. Something where we could roleplay something more interesing
Personaly, The battle realm has the arena so that players can fight each other. But you could add some more areas too. We aren't just going to socialise in a bar/hotspring and then go "You stepped on my foot/you spilled beer on my lap" and suddently go to the battle arena and resolve it in a dispute.
Maybe adding more areas would give the players more things to do. And while there aren't races at war we can't really do much but what stated above. =/