Hi, i have just done this myself as I have just done my AS exams and my school made it compulsory for us to do the exams regardless of if it was linear or not. Only one of my subjects were modular (this being ICT), my others were linear. After thinking the same as you about it being pointless, I did the exams and only then will you realise how different the new specification is compared to the old one. There are of course specimen papers for the specification. When i did the modular exams (ones that have units i.e. unit 1 & 2) I would get an A easy. When I did the specimen papers i still got the highest mark in my year (Biology), however there were no grade boundaries so you didn't really know what grade you would've gotten or how close you would've been to the next grade, you could just use a percentage with isn't actually how grades go, people will tell you 40% is and E, 50% is a D, etc, look at grade boundaries and you'll see that this isn't true. Also, since we are the first year we can only guess what grade boundaries would be usually you could go by last year years and then +/- around 3 marks (this is usually what they would change by in most subjects per year).