Point 1. Agreed, this will be resolved in the second and third movies, so its not too much of an issue for me, however she was made to look pretty strong pretty quickly.
Point 2. Yes I think they have done a good job in layering the character, but I like my bad guys to be seen as strong, whats...
I really enjoyed the film, But no doubt these points have been discussed elsewere but the three things which bugged me were.
1. Rey being able to use the force so well, without the training that others have gone through. I guess that lead to helping people draw to the conclusion Luke may be her...