Leaving it mark down is the best way to keep VCE a fairer system.
To those who are humanity based students, they will be rewarded given that they are skilled in the English Language.
With the science/maths kids, well, they already have the major scale up from maths/science areas.
If the English system, is scaled up, it's only going to give an unfair advantage to science/maths kids along with their +5, +7 bonus subjects and put humanities students at a disadvantage in the long run.
In this sense, with the scale up, the VCE will be further dominated by science/maths sector more so than the humanities side. While your at it, if English is Scaled up, Literature should be scaled up further in proportion

PS: Just realized I went off subject, sorry xD I"ll stop here~~~~~