I was always annoyed by this too! In year 12, my scaled score for literature (my English subject) was almost 10 points below my lowest non-Lit score and yet it counted while that subject was #5. I think it's good they have an English subject because it's important to be able to communicate well etc, but I feel that if you get above 30, that's good enough and it shouldn't have to be top 4 past then. If they have English as a compulsory top 4 subject, they should make a maths the same. It's unfair to the people who have good English skills, are great at maths/science but aren't good at writing essays (like me haha).
Another random thought: why did we make 1L 1L? Our standard for mass is g (unless you're doing physics), kg is 1000g, mg is 1/1000 g. But 1L (of water) = 1000g? Why not make 1L = 1g and have bottles of 1kL like we have 1kg of things? Or have 1L = 1m3 or even 1mm3. 1L being 10cm*10cm*10cm is kind of odd... Units are weird