The way I see it, I like GOG because I like getting good old games for very reasonable prices without any hassle. Of course, this is just a subset of my desire to buy things I like at reasonable prices without any hassle. If GOG eventually expands to encompass newer games while still providing prices and a lack of hassle that makes the whole thing a good bargain then I really can't see how that could be interpreted as anything other than a Good Thing (we'd still be getting good old games as a good bargain, plus we'd be getting newer games as a good bargain as well).
I'm personally a pretty cynical and paranoid person, and although it may just be my ego talking I think I'm also pretty good at seeing through corporate doublespeak. I just haven't any of that kind deception and doublespeak coming from interviews of GOG and CD Projekt employees. Make no mistake, they're running a company and are looking to make money, but they seem to recognize that the way to do this is to offer deals that are beneficial to both themselves and those they are doing business with (e.g. us). The way that GOG and CD Projekt acts in the way they do business also supports what they say. Thus I'd say that the idea of introducing additional price points should be taken in the context of these considerations.