God, the pacing of the Tyrion stuff was just fucking atrocious. It's not going to get a lot better in the TV series - look at how slowly Theon's non-plot evolves this year and you can get an idea of how difficult it'll be to make Tyrion interesting.
Maybe they will give Dinklage a few episodes off and allow Emilia Clarke and Kit Harington the chance to be leads. Dany's being forever stuck in the east is as interesting as it sounds, but at least Jon gets the chance to shine. However, those two actors really need to step up.