With interior and terrains gone, it will probably speed up blockland thus allowing more bricks.
-snip-
Downfall parody - Riddler phones up Kompressorhttp://www.youtube.com/watch?v=oVY5BDckXVw
There's a lot of good points there, but unfortunately, I guess terrains support alone overcomplicated Blocklands code. If there would be any way in the future to bring it back, I'd gladly trade the new shadows for it. But the complicated code won't allow for updates in general, so I guess it has to go. :/