IMO there's no such thing as a secure digital voting system. Complexity is how vulnerabilities and exploits get into in-use systems. You want things as simple a

IMO there's no such thing as a secure digital voting system. Complexity is how vulnerabilities and exploits get into in-use systems. You want things as simple and obvious as possible, and that means using and counting physical objects of some sort. After all, it's much easier to notice a hundred thousand pieces of paper getting added to the vote-counting system than flipping some bits that represent a hundred thousand votes. The voting system definitely needs improvement, but a digital app is absolutely not the way to go. Vote-by-mail solves nearly all the issues you've brought up, and seems to me to be a good intermediate step.