AA hasn't "officially" announced a move toward dynamic award pricing, but a quick search I did for a NYC-YYZ award makes it seem like this has already happened. The "economy Web specials" were originally marketed as a way to get cheap redemptions ("as low as 5k") but looks like we are seeing this shift to the inevitable... The "milesAAver" awards seem to be all but gone, only available on two dates (12.5k) in the below screenshot...
Have others seen this happen across more routes? Pretty disappointing if this is the direction this are headed.