I think obama has lost this case so he is having a public hissy fit to try to intimidate the court into reducing the impact of its ruling, letting the subsidies ride a little longer.
If he thought he had won this case, obama would not be trashing the court.
I think john Roberts has had enough of this petulant teenager and is about to tell him to pound sand. I also think Roberts deeply regrets the stupidity of his 2012 decision. He truly believed the electorate would take care of this monstrosity in the presidential election.
Remember: scotus follows election returns, eg 2014 wipeout.
Roberts was goofy to think there would be a free and fair election in 2014.