They definitely weren't that big, either they CGI her bigger boobs or they CGI her head on a body double.it did seem kinda weird, i don't remember her boobs being that big
That's my thinking, her boobs and body in general were too voluptuous for Lena Heady.Did anybody notice Cersei's face was CG'd on that body?
As for Jon Snow....I'm 60/40 he will make it, otherwise Mel conveniently being there was for nothing. Besides, she needs a new prophesied King to follow to make her existence worthwhile, and of all the people there it's Jon Snow for now.