I think deconvolution works well when your image scale is around or under 1asp and your stars are "fat". CCDStack Devonvolution algo is great [most of the time]. Recently though I have been deconvolving (very slightly) wide field pictures with already small stars. I have found that deconvolution on an already recombined color image can potentially damage the stars in the blue channel in particular for my QHY8. You get stars with a hole in the middle. The latest version of CCD Stack (v2) tends to do that on a color 32bits FITS file. Never had this problem before. Just found out because I had some troubles getting blue colors through in my latest shots with the ED80 and when looking at the blue channel in Photoshop most of the stars had litterally been punched out. Big black hole in the middle leaving only a ring but the green and red were just fine. No wonder I couldn't get blue through.
So my advice if you're going to deconvolve your pics is to do it prior to color recombine and try to match your star sizes in all three channels.
PS: I've just done a bit more testing and found out that using the Saturation in the Color Dialog box is what create most of those holes. So deconvolution is not the culprit.