I recently needed to blur the scene when it's in the background of a 2D UI. This being a post process effect I expected it to be available in the PostFX v2 stack. But as you can guess, it was not.
There is this legacy blur effect, which still works but is not integrated in the stack. I took the liberty to convert it to a PostFX v2 effect.
I only converted the Standard Gauss blur type, the other one called "Sgx Gauss" is left as an exercise to the reader ;)
You can find it integrated in my unitytoolset repo on BitBucket in the post-processing profile of the Stylized Fog scene.
If there are better alternatives, I'm very interested!