Atia same with dd1, she's happier doing 3. I can't tease her though as I did exactly the same (albeit with the waste of time General Studies).
Has he considered doing the Extended Project? Dd1's considering doing it at the moment. Sometimes she thinks she would love to do it, other times she thinks it'll be a lot of work for very little bonus.
I'm a bit put out to find they only finish the further maths syllabus two lessons before the Further maths A/S exams. And it was planned that way apparently.
Seems to me that it's scraping it very tight to the bone. Particularly as it's new spec and no one actually seems to know what the paper will be like.
She also got some questions home labelled "for revision" that they hadn't actually done the method of the particular ones they were doing. I worked it out although I hadn't done it before (thanks Google), but it wasn't the sort of intuitive step up from what they had been taught that would be fair enough.
She's finding the mechanics a bit tough, but I keep telling her that I did at that stage, but when I got to university I loved the mechanics and found it really easy. She doesn't believe me though. 
She's booked 3 or 4 open days so far and is planning on going to them on her own or with friends, which is quite nice. I just hope she gets predicted the grades she needs for the unis she's wanting, especially with the last minute A/S further maths.