This Core Set for agot 2.0 is the first Core that FFG have designed with the fore-knowledge that it would be the first major product that would never rotate out of the card pool. As such, FFG strove to ensure that every faction would feature a number of iconic characters and locations with incredibly strong effects that would serve as center pieces for decks, regardless of the state of the cardpool. If a popular mechanic were to rotate out in the future, players of a particular House could always go back and lean on the strong, signature characters and locations available in the Core Set. For this reason, it was important to include all eight factions to allow for the game to cement the identity of those factions for the entire player base right out of the gate.
Looking at your deck, there are a number of problems I see from the get-go. The biggest issue that I see is that you're running House Stark as your main faction, but barely using any of the core features of it. If you're using a House as your main House, you want to lean on its powerful, loyal cards. For instance, you're using three copies of Grey Wind, but you're not running Robb. Robb turns Grey Wind from a terrible card into a decent one. You're also missing out on the likes of Catelyn and Arya, efficient characters that provide a strong effect and very efficient Stealth. If you are trying to run a "murder" deck, you might want to consider a card like Ice to give you more kill options, or if you are trying to play an aggressive, low-curve deck that then leans on Jon Snow to win challenges, you've left an incredible card like Longclaw behind, meaning that you're not going to be claiming enough power. Sansa is another option to help you claim power.
I would focus on the question of what you want your deck to do, because right now it's a hodge-podge of characters pulling you in too many directions. Do you want to focus on Jon/Ghost? You might then want to consider making it a NIght's Watch deck and splashing some Stark cards. You could then use Messenger Ravens and Samwell Tarly for stronger card draw effects. Do you want to focus on killing characters with Robb, Ghost, and Ice? Essentially, you're not using so many key cards from either faction you've chosen, and your deck is suffering extremely due to their ommission, most notably Robb's. I would revisit the Core identity of your two chosen factions to tailor your card choices to the strategy of a particular one.