I do consider at-home mail-in voting as a bad risk - locally we have a solution that involves separate 'voting stations' (just as any other voting station, officials + observers from opposing parties monitoring) visiting the people who for various reasons are unable to come to vote, and collecting a secret ballot on-site from e.g. bed-ridden sick people; and special voting stations for people who can't leave - e.g. hospitals, prisons, army bases. Of course, that won't help if large numbers of people aren't coming to vote because e.g. the lines are too long or they have to work and can't get to vote, but then you should fix these problems directly.

It is important that people are able to vote without being controlled by their family members or employers, so any unconstrained remote voting should be an exception that's minimized as much as possible.