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There are several aspects that might hamper your enjoyment of GoT. On a gameplay level, it's a more linear, less customizable, shorter version of Dragon Age: Origins. At the outset, you'll allocate points into the protagonists' skills, attributes, fighting stances, and strengths and weaknesses. There are three possible stances for either character, each granting them a certain set of abilities, with three more unlocked at level seven.
Combat is mostly real-time, though opening the ability wheel slows it down and gives you some time to think. You can queue up to three attacks at a time for each character, and they'll carry them out when the game speeds back up. Making your enemies bleed, stunning them, or knocking them down will allow you to string together nice combos, and using certain weapons against different armor types will cause extra damage.
Warging into Mors's dog will allow you to find hidden paths and pull off gruesome stealth kills, and Alester possesses the ability to reveal secrets around him with the vision of his god.
Each successive chapter (there are around 15) grants you slightly more freedom, and there are several side quests to complete along the way, but overall it's an extremely linear experience. As a plot-driven game, GoT doesn't allow for too much customization, and fans of typical open-world games like Dragon Age may feel too restricted.
And fans of the books or show who aren't necessarily gamers are going to be hard-pressed to trudge through the game's somewhat archaic systems. GoT tries to appeal to two demographics that may or may not significantly overlap: fans of Martin's work and fans of old school, hardcore Western RPGs.