They've made Cersei a lot less of a one-dimensional character but I'm hoping we start seeing batshit Cersei in the upcoming seasons. GRRM showed some of this during Blackwater. It can be a fun characterization.
Tyrion mentally notes that if Cersei had had one child with Robert, she wouldn't be in the mess she's in.
Theon's victory was a brilliant coup but he was too obsessed with holding Winterfell. If he had put it to the torch and taken Bran, Rickon, the Reeds, and the two Freys hostage, he would have put the Iron Islands in a better position. Of course, I'm convinced Balon still wouldn't have given him any credit.