At least you got an e-mail.
I have a 5-sector trip to the US coming up, 2x BA in J and 3x AA in F. All 3 AA flights have been retimed (the worst is 1'30" later, the others only a few minutes), and 1 of the BA flights arrives 15 minutes later. So just one of the five remains unchanged.
E-mail? No. I found out only when entering hotel accommodation in API.
I can and must live with the changes but am surprised not to have been advised.