There is a reason to get rid of interiors and terrain. It just complicates the code, as Kompressor had said, and results in making the code much harder to update, or something. It's not like the staff will just be removing interiors and terrain without something to soften the blow. They added in shadows, and you look me in the eyes and tell me they don't look amazing. Terrains had their use, yes, but I rarely used them, and therefore, I side with the shadow update.