I found the movie not as bad as people are trying to say it is. I think people are saying it's bad because they didn't make it exactly like the first film in every single detail or because they expected it to have certain things that it did not. I believe the point of a remake is to make your own version of something, not copy the first film so we all know what'll happen every time. In my opinion, this film did a good job at keeping the main parts of the first film, which is all any remake should do. Outside of the main parts, little things were changed, such as different settings and different groups of people, which original serious fans threw a fit about.
Zoe is a beautiful and talented actress and I don't think it was wrong for her to play Rosemary in the film. Zoe is one of Hollywood's new hits, starring in lots of new film, she was perfect for just advertising the movie alone.
If you're a serious fan, like you know every single detail from the book and/or the first movie, this film might not be for you in all honesty. If you want to see a modernized version of a film you saw in the past with new famous faces, give this a watch. If you don't know anything about Rosemary's Baby, you should definitely give this a watch. I also thought it was creative how they turned the movie into two parts, I hadn't seen that done yet, but that may just be myself.