one of the issues im having with GoT is the constant leader changes story hiccups among the factions. it seems like an all out war is constantly in delay mode because every time theres a build up towards 1 person leading the charge/way they get off'd and things gotta start over to build up that new person/direction
like right now we have white walkers, nights watch/wildlings, boltons/houses of the north, kings landing/sparrows, iron islands, lannisters/chicks from dawn, daeneys vs the sons of the harpys then theres the dothrakis... and whatever the hell is going on with the young stark girl and the house of black and white/many faces, bran stark and his visions, sansa and brienne...too much going on.
I suppose the white walkers will somehow unite everyone to fight a common enemy but its so damn slow and taking for ever everytime they start over. at least 1/3 of the story lines going are unnecessary