Comparison of "Catastrophe"--- A little late

Even though I had some technical difficulties with the video of "Catastrophe" and was unable to see it until after this post was due, I figured I should at least post my initial observations on the written version of the play and the video and then proceed to pray for credit.
While viewing the film in class yesterday the most significant aspect that I noticed was the way the camera deprived the audience of a view of P's face. I did feel that this was interesting because I think that had the play version been able to deprive us of this view it would have gotten across the point that much better. Despite the point of this technique I found it very frustrating to be unable to see P until the end of the play. The other difference that I noted was of course the situation with the hands. While in the play the hands were clasped by A, in the film P is made to point his finger. I wasn't sure what to make of this but the ideas of my peers were helpful when we discussed it after the film was over. The final difference that I noticed was the replacement of the cigar with a flashlight in the film. I personally felt that this took away from the piece and was rather confused why the director chose to do it this way.
I did not notice the difference in what the assistant of director was wearing until it was brought up in discussion but I found it interesting that this difference occured. I don't understand why the director changed so many important things in the film, but I know he must have done it for his own reasons. I personally feel that the video has nothing on the vision that I created in my mind when I read the play, but then isn't that how it always works? It seems that written pieces are nine times out of ten more enjoyable than the films that they inspire.