I just want them to finish that official modding API, so that any random person can set up a server with a ton of random mods and whoever joins downloads all of them automagically and there's a bunch of random BS going on that you don't understand on all the servers and it's just like Blockland!
[/sarcasm]
But seriously, if they can set it up so that mods don't have to get deprecated with new versions of the game anymore, I'll be happy.