I'm a non-reader coming with questions because people on the non-spoiler thread don't know anything. But if you do spoil something for me, I won't mind.
The show does an awful job of explaining the feudal hierarchy of the realm. That characters continue to reference 7 kingdoms to further add to the confusion. Through some searching on some show specific wikis, I've pieced together that the realm is divided into 9 administrative regions; basically duchies under one king. The "duke" is called lord paramount. Every noble family that isn't one of the lord paramount families, is a vassal of those lord paramounts. The Freys, Boltons, and all those banners that Podrick named are among their lower lords. If I'm wrong about this let me know.
But knowing this adds to my confusion about the Freys' and Boltons' motivation. As a reward for their loyalty to Tywin the Frey's get Riverrun and the Boltons get Winterfell. Seems like fleeting reward to me. Now that the Starks and Tullys are dead or at least out of power, shouldn't they be given the lord paramount title. For example, If I conspired with the Emperor of America to dishonorably kill the Duke of Texas, the fate of the castle or city of Austin would be completely irrelevant to me. I'd want the feudal title Duke of Texas because that's far more powerful. Austin alone, even if it were the greatest castle ever, seems like a small reward especially because the higher title is now open.
This title confusion continues in the Tywin conversations with his family. That Tywin is lord of Casterly Rock is non-meaningful understatement. Lots of people have castles. According the wiki, Tywin is Lord Paramount of the Westerlands. When he gives Jamie Casterly Rock, does he mean merely the castle or the Westerlands?
The implicit titling is really confusing in this world. I want to know if I've this pieced together properly from book readers before explaining to others.