Say what you want about ravens flying extreme distances and delivering their message in the very next scene, I still feel that this is an incredibly written show. I'm reading A Clash of Kings, having never read the books before watching all 7 seasons and came across this line from Tyrion. This is exactly what he would say in the show (or in truth, GOT Tyrion is exactly as book Tyrion is, and should be.)
"What else is a Hand for, if not to hand you things." I can picture him saying that in the show....they've truly nailed these characters for 7 seasons.
It's going to be a long wait until 2019, but I've done it before when the Sopranos had some very lengthy hiatus'.