If you love English, yes, it can be worth it - but definitely if you also appreciate the theoretical side of English.
I went into EEXT1 simply because I was good at English; I had no real reason. I eventually also completed it just so I could take EEXT2 (there were only two of us doing it in my year, haha). But when I began I didn't have much of an appreciation for the theoretical underpinnings of literature. I grew into it over time, and it definitely improved my Advanced scores by multitudes. Also, it can really depend on the focus areas you study. Some of them, like Crime Fiction, for example, can be very interesting, but not that appealing if it's not your thing. I'd give it a go regardless; you can always drop it, and I found it didn't take up too much extra study time (it kind of merged with Advanced English in my mind and they became just one subject/assessment period).