Arizona’s law is still in litigation, so keep fighting. The 9th circus enjoined enforcement of it the first time around, and the SCOTUS smacked them down, so it is now back in the trial court. It is NOT enjoined this time, so it will be in place for this election.
Watch for the Rats to manufacture some best-case challenges and take it back up; however, also watch for a very clean election with insignificant burdens on voters. It could cut both ways.
As for the questions about what IN did differently, there are a number of things, but IN is actually a more burdensome law than others. Georgia, for example, had a voter ID law invalidated, so went back and amended the law and it passed muster at the trial court.
The keys seem to be 1. the ID must be free, so as not to be a poll tax; 2. several different types of photo ID must be accepted, and 3. provisional ballots can be cast without ID that can be supported by affidavit executed w/in 10 days at the clerk’s office.