I legitimately don't understand what's the invention here. If all you're trying to do is avoiding having an invalid or ambiguous ballot and you print out a paper copy anyway, why invest 10 million into a new system instead of just using some bog standard computer + printer?
If you're going to get the physical ballot anyway what's the point?
Systems comprising entirely of pen/paper and manual counters with oversight by the parties, where sufficient engagement in the community provides the volunteer manpower to oversee the election, are impervious to electronic interference.
If you're going to get the physical ballot anyway what's the point?