Thanks, what a great post daniellam! So basically AA will re-issue the tickets now for a lot of things which didn't require a re-issue before.
So this will lead to a lot of discussions with AA because the OW rules say that certain changes are free of charge but a re-issue attracts a fee. AA will now re-issue for something which should be free. I can see there being some discussions.
But I think we always had this with carrier changes which always require a re-issue (that's what my TA says) but are free according to the rules.