Changes have been rippling through the system in the past few days. But not all at once.
So my travel agent sends me changes, which result in unacceptably long layovers. I look for, find, and ask for better connections. By the time she gets to book them, these connections have been changed away and replaced by something else.
In another case, Expedia has a different flight time for the same flight number than AC.com. Now I don't trust either.
Likewise, I've noticed that UA is removing certain ewr-yhz rotations here and there, while AC.com still sells them as phantom codeshares.
I'm not convinced that they are done yet.