What about the ability to re-size blocks to span across another block. For example, create one big wide block that spans across let's three blocks right below it.
I couldn't really see, but the video shows a layout called "top area with 3 columns." Looks to be it. I might have to take a look at the demo site (depending on if it will work there).
I should add that the revision right after mine pretty much broke everything again. Talk about luck.