well... for what it's worth some of us have been experimenting with various ways to tame color neg results with color management processes, on a film batch basis. I came up with a convoluted approach that results in some of the best color I have ever produced, for one project, from Ektar 120 scans. However it's not anything really workable, and was simply one idea that will be abandoned on the way to better ideas, hopefully.
If we get something workable for humans.. it'll get posted.
In the meantime, I guess dinking with negafix (I too use Silverfast with my Howtek) and a lot of PS work is the way to go...