Should be everything. The emerald ore will only be in mining world. Im not sure how many villagers we will have left. But I tested every new aspect of it myself, and havent found any bugs or exploits yet. Something could be removed with time, but I am pretty sure it will all be there to start. :D

 

Emerald ore will be added only through mining world resets, and ender chests will hopefully not be able to be locked. As for the new xp system, I don't have any information about whether or not that will be included in the server once we update to 1.3, but I would assume it will be. Villages will also be in the mining world, if we use the default generation, but those will most likely be killed off quick. Also remember that we usually wait about a week before we update the server.