Feedback is very explicit and clearly suggests the weaker parts of the essay whilst highlighting the stronger ones. I'm sure you can get that rank one for modern ! Keep at it :D
I will be completely honest and tell you that you cannot classify subjects into a "content heavy" category - as in reality, all subjects require thorough study and dedication. However, I can say that both physics (although I do not do physics) and economics are both 'conceptual' subjects and...