I see you lost a half a million visitors in traffic after the de-ranking… Ouch!
IMO.You are kind of hiding the original source and do make it hard to find. Yes you show the source and your call to action is "Read More" but your site does not give the appearance of a news aggregator.
Oh there's some benefit to be squeezed out of it I agree. It was news to me that google are sending this info.
These comments aren't going to be available to everyone who hits OP's site. If we're lucky, it's not a popular site and no-one will see it. If we're unlucky, the next web app you use could be coded by someone self-taught by articles like this.