ImTheCaptain
I disagree with you
Ramsay certainly has a big role to play in the second half of book 2. Obviously it ramps up down the line but it's pretty important at times this season.
http://www.metacritic.com/tv/game-of-thrones/season-2
I mean, his character does important stuff in Book 2, but as a major character he's not really involved directly with the main characters until book 4.