re early voting: I can sort of be ok with expanding voting from part of one day to perhaps as much as a week. with that them thumb inking works fine.
re mail in: lets dial that back to absentee which had higher standards which made hacking/cheating very hard (so long as the rules are followed as they were not in 2020, signature matchingfrom the applicationand the returned ballot.).
If you allow absentee voting, you negate the purple thumb idea.
The system is already secure. Just because Trump lies about it doesn't mean there's anything wrong with it. Again, focus more on the oversight than on banning stuff.