It looks like you're new here. If you want to get involved, click one of these buttons!
20 million people across the globe have minecraft. You can build everything, destory everything, PK players, kill NPC's in the most basic form. Shadowbane was that as well but had an RPG element and actual persistant world. The number of players playing Minecraft trash the 12 million players WoW used to have.
Players want sand and are willing to play a horrible looking game to do so (Minecraft and Shadowbane were good examples of this).
Lets update that idea and do what Shadowbane did almost 10 years ago: 1000 vs 1000 player sieges on cities built by players for players. No other game has matched the siege side of Shadowbane but at least one game meets the sandbox side (Minecraft). Why can't developers do today what was done years ago?
The definition of insanity: doing the same thing over and over expecting different results.