A levels were hard for me, the level of knowledge they expect is a lot higher than GCSEs so yes the jump up is big. But I did all essay-based subjects politics, French, English literature and economics so there was a lot of writing to a high standard and being concise. It probably just depends on the person. I know people in my classes who are a lot better than me, and people who have dropped out. I don't know about the new system though, ask again next year lol