Rant over, before I head on to how much they've raped the character of Mance Rayder.
I don't know if you could say they've raped him given that they've hardly featured him. Which is odd, given that the chatter pre-season 3 was that they wanted a name actor, someone of the status of Sean Bean, for the role.
IIRC, The Wire's Dominic West was pursued but turned it down as he didn't want to be away from his family. Hinds is another actor with clout but he's had a handful of scenes. I can only assume that they're going to make more use of him in the next few seasons.
I'd say that there's a stronger argument that Tormund Giantsbane has been 'raped' as a character, though it seems to me that they've sort of merged him with the Magnar, even though the latter is apparently going to be in S4.