As a workaround, would it be possible to assign two or more Status columns to the edit phase for multi-step Status tracking? e.g. 50% Edit, 100% Edit - or step 1-3, 4-6 etc. You could then weight them (20/80, 40/60 etc) for the progress calculation.
A related feature request was posted earlier this year for more granularity on the status column using both weights and colors.