If they'd killed Tyrion, Jaime and Arya in the same scene then maybe
Do you honestly think non-reading viewers are going to like what happens to Tyrion, Arya, and Jon Snow for that matter if the show follows the books? And Bran? Seriously?
At some point there's going to be a massive "Screw this," from the viewership. The only thing saving this series past season 4 is Stannis' storyline and Dany's.