Hrmm, this is actually one thing that AE would do very well at. Do you have a logistics crafting table set up to un-craft the Compressed Cobblestone? Can you request Cobblestone, and get it to make you regular Cobblestone from the Compressed?
Yes and Yes, though it won't auto fill up the barrel with cobble once its out for some reason. I do however have an AE system laying around that I could use instead if it would be easier. Would I need a ME Export bus for each barrel? While thats kind of expensive its alot cheaper than my DSU on each barrel idea.