Okay, if you read the "Module B Support Document" on BoS website, it talks about focussing on YOUR interpretation rather than the interpretations of others. As it is a critical study of the TEXT, your main priority is show that you know the text, and set up your argument according to evidence from the text rather than evidence from other productions... As my teacher has said numerous times, directors who have put on productions of Lear are not Shakespeare, thus they have no authority in terms of what the text actually means. You ahve to draw it from the text... Yes I'm repeating myself but it's important.
My teacher who is head of English at my school and has marked all the sections of the HSC has reiterated soo many times that they're not looking for other people's productions. You write what you believe supported by quotes, and then you can add a few sentences saying "This idea is supported by Peter Brook's production....." or whatever. That's why the questions have changed, becuase otherwise people say "Here is a Christian reading" "Here is an Absurdist reading", but nothing really from the actual text. So yeah
your interpretation first.