Every couple of weeks the game gets stopped because a player is down 50m behind the play. The only reason this one is controversial is because hating Penrith has become the popular opinion nowadays.
As for the supposed controversy of the interchange card used to take him off, it's no different to when Munster comes off for 15 secs and then sent straight back out there. Do you think they would be doing that if it meant they had to use an interchange to bring him back on? No, they get a free interchange to bring him back on as well. TPJ went off using a free interchange, so he was allowed back on with one.
Likewise with Sorensen staying down. The same people criticising him are the people who thought Wallace was right to stay down when Lodge hit him high. And before anyone suggests the Sorensen one was used to abuse HIA rules, he had been on the field for 7 mins. He didn't need to be taken off.