I have not flown since before the changes were announced, but they came to light quite prominently on my recent trip to the US (I was rebooked via DFW on my way to JAX):
LHR > PHL -- Y/O -- 20 TPs, 887 Avios
PHL > DFW -- Y/Y -- 20 TPs, 1,302 Avios
DFW > JAX -- Y/Y -- 20 TPs, 919 Avios
For my TATL to PHL to get as many TPs and way fewer Avios than internals is just abysmal. I understand that Y is a fully flexible bucket and both of those internals could well have been more expensive than my TATL segment, but still. BA sure don't make it easy to square that circle...