It's odd to not have received an email yet isn't it? I've never had to call and accept changes, only to make changes after the fact for MCT.
In the case of this trip all 4 segments have had a change, the departure leg and subsequent connection are only 10-20 minute changes and I have no issues with them. The return and connection are several hours to my benefit (which I was expecting from past experience). I shouldn't have to call AA.