Although the big rock was cool I have to agree with you that it does take up quite a bit of space. On the contrary, I like the new layout better. I think the two pieces of driftwood looks better as well.
My only concern is the depth of the substrate. It looks fairly deep. Do you have something under it raising it or is it all eco under there. Heavy root feeding plants would help the substrate if its all eco. In your deepest parts I would definitely get heavy root feeders to help take oxygen thru the substrate.