I will have no qualms flying on the MAX when it goes back into service for all of the reasons already stated. As for AA, I received an email this morning, notifying us that our flight next year from Charlotte to SXM had been changed, so we now arrive home an hour and a half later on our return. Not as good of a connection, but good enough. I didn't bother to check the aircraft type.
We have flown AA several times a year, for many years, all over the world, and I have nothing bad to say about the airline. They have always emailed us with any changes, and have been very accommodating. There were problems with the 777 aircraft in the beginning as well, and we have flown in that aircraft all over the world. Granted, no 777 has ever crashed, I get that.
I would be much more worried about your trip TO the airport, if you are in an automobile. Your odds traveling in an automobile are MUCH worse than flying in any airplane.

CHEERS!