Some other methods of achieving a blur effect that I've occasionally used in LR, but should apply to C1 as well... Is adding [maximum] noise reduction, and maybe trying out negative contrast - although the latter, IIRC, may sometimes strangely do the opposite. Depending on the area, I think I also might have played around with reducing exposure/higlights a bit, but it's been a while since I've tried blurring effects. Reducing vibrance/saturation a bit may also help.