So far the plot of the show is ok, but I think the biggest thing its missing compared to the original is just the personalities.
Ned Stark, Robert Baratheon, Tywin Lannister.....these are larger than life characters that just jumped on the screen due to some amazing work by their actors. Even though we had the newcomers like Emilia Clark and all of the stark kids, they were backed by powerful actors that really pushed the narrative forward in that first season.
I'm not feeling any of that so far. The acting is "fine", but I'm not "feeling" the plot from anyone really, its just scenes and talking, but no one really embodies the characters like I felt in that first GoT season.