I shifted to CX as a result of the basic Y earn on CX versus AA and the fact I was never going to get to lifetime Platinum with AA. (Add in some AA customer service fails).
I wonder what effect CX's changes will have on the future of AA's program. For CX status earn in the Y and PEY cabin will become "very difficult". The ability to earn OW Sapphire flying Y/PEY with CX is becoming challenging.
One of the sweet spots in the AA program's status program has been the PEY cabin (QF/BA/CX) and there are still a few locations where the choice of that cabin makes financial sense (eg USA to Asia since it is either the AA code share or CX H class). I (hopefully) will have two more years of reasonable travel, so am hoping that AA's program changes will occur on or AFTER Feb 2016.
I cannot believe that AA is only looking that the UA/DL changes when their major OW partners (QF/BA/CX) are all making major changes as well.
Happy wandering
Fred