Degrain tools are not blur filters, wuther. However depending on the film stock and the DNR settings dictates how much lost detail in the final image.
Degraining then regraining does not help correct lost detail but it certainly fools a lot of folks.
Universal is really mucking up their titles by all this degraining, no manner how much spin they spew out, it essentially defeats the point and benefit of HD for home video.
Politics is like a corral, no matter where you are you'll always be shoveling it.