Bashiok
The change is still in for the failbags to ... not be fail. They'll have a chance to contain things like very valuable grey items (essentially randomizing the gold you get from the bags), LFR versions of non-boss loot,
Espírito da Harmonia, consumables, pets and mounts, and... maybe some other stuff I forgot. Lots of things! Opening them should have some anticipation and surprise now. :)