It does seem that Obamacare has created a strange kind of amnesia that before Obamacare insurers never cancelled policies or change doctors or raised rates or did anything bad. For the next few years everything bad that happens in the world of health care is going to be blamed on Obama.
And Regarding Medicare Advantage
The Romney/Ryan economic plan included the same Medicare Advantage payment cuts as Obamacare even though they say they planned to repeal Obamacare. So Medicare Advantage was getting payment cuts regardless.
http://www.politifact.com/truth-o-meter/statements/2012/aug/15/stephanie-cutter/ryans-plan-includes-700-billion-medicare-cuts-says/