Pinside rankings don't rate how fun the gameplay is. That's just one of 16 aspects. Game of Thrones Pro has one of the worst translites and playfield art packages of any Stern game. Big toys and gimmicks were removed from the pro, and that's a category you have to rate, even if it makes the game MORE fun in your opinion. Theming? Gears. Lots and lots and LOTS of gears.
If you gave an excellent rating to the translite, playfield art, or toy category just because the game is super fun, you're just gaming the Pinside rating system. Since everyone does this anyway, Pinside rankings are pretty stupid.
When there's only a 1 point difference between #25 and #200, things like art and toys pulling the score down makes a huge difference.