In your 2^nd paragraph you write:

Effectively manipulating the mise-en-scène for deep focus actively engages the whole space of the frame without leaving the viewer confused. This technique is most effective in scenes that depict Kane's loss of control and his personal isolation because it gives the audience a clear view of the space Kane commands as well as the space over which he has no power.

Does this sound familiar:

Effectively manipulating the mise-en-scène for deep focus actively engages the whole space of the frame without leaving the viewer confused. Deep focus is most effective in scenes that depict Kane's loss of control and his personal isolation because it gives the audience a clear view of the space Kane commands as well as the space over which he has no power.

You have plagiarized from this webpage: http://www.sparknotes.com/film/citizenkane/section2.rhtml