I suspected that Opie was going to come to a bad end. First, his wife (who he did love) was murdered by his "family", the club. Then he started to distance himself from his children (who he didn't know well anyway due to his time in jail). Then his father was murdered, once again, by his "family". When he admitted to Lyla that he didn't love anything anymore I knew he was finished.
Opie's murder has recreated Jax. As he watched his best friend die I think we witnessed the final death of the idealist young man and the birth of the hardened gang leader (or future "king" if you believe Pope)
Compelling episode. It sucks that we lost Opie...but we're going to lose a lot more before the series is over.