https://en.wikipedia.org/wiki/Americ..._Airways_Group
That's not quite how it all shook out.
TL;DR
-The merger was seen more of a merger of equals
-AA branding remained due to better name recognition
-Most of the management team is former US, Doug Parker was even the AW CEO before the AW-US merger
-One world stayed because why would the new AA stay in Star Alliance with United?
-Most operations facilities consolidated to DFW because they already existed, previously US had stuff all over, HQ in PHX, operations center in PIT
So no, AA didn't really take over US Airways.