Yes it does say that AA can change the rules at anytime. However, it seems these changes should affect the FUTURE, not the past.
We all earned the miles knowing and expecting that 25,000 miles = one coach award for example. I could say that I would not have flown or charged on my CC if that number would have been 50,000, for example.
By these changes they have taken something of value away from us, and somehow it seems like we are entiteled to compesnation for our PAST miles.