The Yara scene was pretty meh, but since it gave me a real hope for a full Greyjoy focus (Balon's death, Victarion/Euron and Kingsmoot) in season 5, I'm glad we had it. She will retreat to Moat Cailin, possibly learn about the death of her father. Kenning who will appear might say to her than Victarion has returned to Pyke and maybe (I hope) he will mention Euron's back. So she will leave too, possibly before Theon and Ramsay arrive and flay all the remaining Ironborns. And I'm convinced that she didn't sail all around Westeros. Those were just barks, so my guess is she sailed from Iron Islands to Moat Cailin then took some others boats to attack the Dreadfort.