I have lived in both. IMO, the universal mail-in ballot is great in many ways, and please don't forget that the current regime of 2020 election deniers equates "voter fraud" with "We disagree with the results".
Two paradigms apply to the cult:
1. Every accusation is a confession.
2. An entire group is defined by a designated outlier. (Think "Willie Horton")
But technical issues of very late vote count are above my pay level to diagnose and fix, even to what extent any fixing is worthwhile. Think Pareto Principle. You want to fix the 20% of causes that lead to 80% of the problem. Both neglect and perfectionism are common enemies.