Is your teacher an examiner?
I am fairly confident you will HAVE to include the visual somewhere if you are wanting 9 or 10.
+1
Examiners report in 2009:
Students needed to demonstrate their ability to understand how language is used to persuade. Students could select
different parts of the material to exemplify and explore language use. They were expected to acknowledge and explore
the way visual features were used in adding persuasiveness to the entire piece.
and also my tutor read this from somewhere but I don't know where from: "students who did not analyse the visual were not penalised however those that did were well rewarded."
sounds to me like its beneficial to write about the visual.