So from what I've been reading everyone is very hung up on the exclusion/inclusion of roles or their viability as playable classes (I haven't played the pen and paper, just the witcher 1 and 2 and am really excited about this game, so I might be completely off base here). To me it seems like this wouldn't even be a problem, if the Roles are essentially "background" that has effects on the game and allows you to play it. The first few posts were pretty heavy about the exclusion of cops, but I really don't see it as a problem in the game- if its open world narrative there is going to be an overall story arc, so the game devs would have you select your Role at the start, and that determines base stats and some initial skills. Then, because there is a storyline and a beginning and end, you are *thrust* into a different setting. i.e. becoming a grey warden in DA:O. You can then skill in different ways according to how you play and missions change based on your decisions, but the overall arc stays the same.
So maybe everyone is forced to join the police and fight crime or whatever (or whatever story arc they come up with), but your initial Role determines your reactions to it, like maybe the cop gets dialogue and missions for being a cop and a criminal has to still become a cop or whatever but they can have quests where they use their criminal background to their advantage or turn the police into an extension of the criminal underworld...
And people can still play within the roles, if missions are designed for roles but still fit in the overall story arc, so if you don't want to fight you don't have to. Same problem, multiple ways to a solution.
Although, I wouldn't want this to be like Dragon Age, because that was too "good", your role was pre determined as a good guy, you couldn't play as a darkspawn and try to overthrow the world sort of thing. I am hoping for more open choices than just race and class, but I think Roles can still can be implemented in a way that doesn't make the game too heavy.