New "Semester" Scheme For Form 6?

I've received the following complaint from a Form 6 student. I don't agree with the bits which said some of the activities are a "waste of time", but the concern over long school hours is very valid. When commenting, please remember that the writer is a 17-year-old.

I am a lower 6 student. A new system has recently been implemented in all schools with Form Six classes throughout the country. All Lower Six classes from 2009 will have to stay back until 4pm. This new system started in my school in early July.
I found out from the teachers that this batch (2009/2010) was used to try out the suitability of the semester-based system to be implemented in schools in the future. Unfortunately for us, our exams are still not semester-based.

Staying back till 4pm means we, Lower Six students will not have a chance to participate in the extra-curricular activities as all the club and uniformed body meetings are held after 1pm. What about our co-curriculum marks? We were told that 10% of the overall criteria to enter local universities is from our involvement in co-curricular activities.