Yeah AZ mail in ballots are more conservative than most of the rest of the country due to the very large old population there.
I think the major problem with the election wasn't so much the mail in ballots themselves, but the fact that they weren't all counted on or before election night. America deserves a final answer by midnight EST on Election Tuesday night (Wed morning), except in an extremely rare case where Alaska or Hawaii would be swing states that would sway an election, which wouldn't happen. But the lower 48 states should be called by midnight EST, no exceptions, no excuses... unless it's literally razor-razor thin, by less than 1000 votes for example.
Look at Florida 2020, they are a model example of how to do an election properly. Count the early and mail in ballots ahead of the big night and then get to work on the day-of voting. The decision was made well early into the night. They certainly learned their lesson from 2000, that's for sure!
Basically, if you're going to have mail-in and/or early voting, early voting needs to be completed by the Tuesday before the Election Tuesday, and all mail-in votes must be postmarked 2 Tuesdays before election night so they can be received in full by the week before Election Tuesday and be completely counted before the day-of voting begins. However, no states should be allowed to release official results to the Media or anyone else on any of the early/mail in ballots until the polls officially close.