hi
I believe its not how "cool" the topic sounds. Its really a elective for the teachers, how experienced is your teacher at electronics.
remember the average physics teacher is about 50-60 and when they were at school, they were not taught this stuff, So this contributes to the rareness of your module.
The next thing is resources, do you have the textbooks, the Jacaranda is the only one available....so maybe thats too limited for u.....you may need to use the net...
Overall, I believe if u do a rare elective,you are competing with people who are very good at the elective, most people who do those elective either have teachers who teach it, write the HSC for it, mark it, or are professional at it, so if u do it and do bad, you will be dragged down.
For me, I am staying with Quantum to Quark, my teacher is senior marker, and makes and marks QTQ....