Heartbroken for Myrcella and Jamie. But he does seems a bit out of character... I don't find his character arc very believable, he's just changed too much.
Yeah I have trouble with Jamie's arc. I really like the chap at this stage and I'm not sure I should - in the earlier seasons he pushed a child to what was almost certain death, aided in the imprisonment of Ned Stark, murdered a young cousin (?) in order to try to escape captivity and perhaps other things I've forgotten. Also his incest with his sister, although that's more 'freaky' than evil. Apart from having sex with his sister I can't see him doing those other things now.
It might be one thing if he did all that bad stuff as a child or a teenager but it's quite another that he did them all as an adult man. Seems like he ought to be exactly the same adult man now, prone to behaving in that same way.
I think we discussed this in here before but I can't remember the outcome.