Fakelottes: any way of making the mask smaller for 720p?

hunterk this one is for you, I guess.

So I love this shader: it looks fantastic, is blazing fast and goes well with non integer scaling. Thing is, I run RA at 720p and at that low-ish resolution the shadowmasks look quite big. I’m trying to make them smaller/finer. Also, would it be possible to add some lightweight bloom/halation to it?