You mean, setting a 8x8x8 cube of TNT or simply the fact it "vanishes" an area of 8x8x8?
im saying despite what I said earlier given it strengths and weaknesses there are more effective griefs than tossing a base in a box. plus it might not pop out centered to where it lands (how much lava can you fit in a 8x8x8 space? 512 how much power can that make? 10240000EU intresting )