I'm completely sure that Physics is going to be the right choice to drop if I decided to change my mind on Engineering during the next year, yet I realise that:
The Pros of Physics - High Scaling, Pre-Req for Engineering, Possibly more interesting due to being one of the purest, and may go well with the maths that I'm doing
Cons - Interest is not that high, Bad Teacher, Concepts and Calculations will be difficult (if not understood)
somewhat outweight the:
Pros of Biology - Interest, Rote-Learning, Good Teacher, All Memorisation, Somewhat easier
Cons - Low Scaling, Irrelevant after school, Heavy Content
The thing that shines to me the most is the Scaling and the Pre-Req. The topics of Physics are interesting especially Space except Motors, but all other subjects interest me so no point in saying that. As TehFlyar said, self-study/tutoring would be a way for me to improve my marks and dropping Biology would of course give me more time to study Physics.
I took a look at the Biology syllabus and everything looks fine and direct. Biotechnology looks interesting if we do it.
While.. Physics looks like fucking cancer. but scaling..
Yea I think my final decision will be Physics unless something else sways me.