It is great that this is happening now. The optimal strategy would have been to do this right before the elections. By making this known so far ahead of time, there is plenty of time for secretaries of state to adjust to postal mail being attacked, and at the very least widely suggest citizens use drop boxes instead of relying on the mail.

If you're in a contested state, worried about election day interference/intimidation from ICE (SS) or the Poor Boys (SA), and really want to mail in your ballot, you could do so and still show up a the polls on election day to make sure they've got you down as already having voted.

A good thing for states to do would be to revamp their systems a little bit such that a person can mail in or dropbox a ballot, but still vote at the polls anyway and have their poll vote counted instead of what they've already mailed in. That would protect against outright tampering.