I would love to see some things that add to the since of adventure and mystery.
Something like unique portals that spawn randomly around the world in pairs. Step through, where do you end up? Top of a mountain in the ruins of a massive castle, deep in the Mistlands, on the back of a leviathan? Is the portal two ways, can you get back?
I would like to see some larger one off derelict structure throughout the world. A since that this is a lost land, more unique then the small settlements scattered in the meadows or towers in the mountains. I would like to stumble across a city, castle with a sprawling dungeons riddled with enemies.
I would also like the Wishbone to be expandable to find more hidden things, like dwarven tunnels and catacombs. Ancient labyrinths with mini bosses.
The possibility's are limitless with this, I'm excited to see what comes of it!