i’m not sure honestly; i personally don’t think there’s anything wrong w writing less because they’re not marking by length they’re marking by the depth, sophistication, and structure of your discussion, but it is harder to reach those points with a shorter discussion.
i hesitate to say any numbers because i genuinely just don’t know! i’m sure it went fine regardless, lots of the skills you learn for imaginative writing translate to discursive writing and the markers should recognise and reward that