I would probably change it some. I would have to check on the details but I thought they changed the sword some to make it Oathkeeper. Even if they didn't I would light it differently to minimize the gaudiness.
***Spoilers**** I don't have that much sympathy for Joffrey. His behavior is partly his parents fault (both natural and Robert) and partly his own. Plus Myrcella and Tommen don't seem to be as disturbed. I was not happy when I read that he died, I was more worried about how it would effect everyone else.