Regarding the new title sequence:
I thought it was interesting that they chose the re-use the same theme. Was a little disappointed not to hear Ramin Djawadi come up with something new, but if it ain't broke, don't fix it. As for the visuals, apparently each of the sigils represents different characters/periods of the Targaryen dynasty with the characters who are dead gushing blood. Will be curious to see if this evolves between episodes like the map in the original did.