Hi John,
In fact those two example images are pretty decent - I would have been delighted to have achieved that myself only a few years ago.
However - just having someone 'look at' your final result won't (necessarily) help identify areas that could be improved, or methods that could be modified.
Perhaps you could initially consider creating a breakdown of the method you use to acquire your raw data - including the number of, and exposure time of, all your raw subs (from calibration frames to light frames). And, don't forget to indicate the 'order' in which you acquired the calibration and light frames, as well as whether you believe that the DSLR CCD Temperature might have been influenced during these stages.
Then you could describe for us what your initial workflow has been - in terms of the image calibration stages.
Just taking the time to commit all of that 'to screen' might actually make you realise that you have 'missed a step' or even 'made a mistake' during the acquisition phase. This, alone, can pay huge dividends (I know as much from personal experience
).
After that, then we can start thinking about the processes that you have implemented as you start to work on your 'Master Light' - for example, I typically have a seven-stage (-ish) process that takes my initial MasterLight from the Linear world, into the Non-Linear world. Only then do I start thinking about noise reduction and contrast enhancement or colour saturation enhancement. And then, finally, I frame and crop, and convert to JPG, to suit display on my 65" 4K UHD TV - which is just about the only place that I ever 'show' my images.
Hope this helps.
