Great work , and as much as i like it and is great idea the software skew alignment, it has some draw backs over attacking the root cause, probably the biggest draw back in this case is related to VFA and fast printing with ringing , the second one is out of alignment rods and movement will cause extra wear and tear. and is not cheap to replace and extra time. Also it may cause extra tolerances in the print out after a while
here is a few ideas, note that was just quick skim not extensive research:
partial Alignment
Pullley alignment
i am sure there is a lot more information online or as engineers you can find more methods to align the actual printer, I would not expect after spending 2000EUR to have a basic skew and alignment issues, fortunately my one actually is pretty good or with in acceptable range
In saying that keep it up as extra SW compensation is always good
Probably make sure that you can turn it off and on as changing parameters to 0 is not aways the easiest way
Again great work