Perhaps the reason they changed it was to give it a more iconic look, like SoulStorm Brewery and the Mines. There's no clear shape to the old Rupture Farms because we never saw much of it from the outside, but I don't think it's necessary to give it an iconic look, it makes it seem smaller, less mysterious and therefore less dangerous. Also clean and sci-fy-y. :{
You know that was intentional though, right?