I have really noticed it in the past few weeks. Watching news/sportscenter, some text is barely readable. Lots of compression with fast moving objects.
Buckeye used to have very good PQ compared to Time Warner or Comcast, but since they've been trying to up the internet to speeds that nobody even needs, the PQ has gone done considerably. I assume they think nobody (or only a small amount of people) will actually notice the decrease. They'll keep doing it.
One can only hope that with the removal of the analog signals, that they would use that extra bandwidth to increase PQ on HD channels.