I'm up to take my ATPL exams and have to say that there is a huuuuge gap in the way of teaching things. All the 14 Jep books, the Phil Croucher book itself are not sufficient to cover and especially to help memorize the huge amount of infos you just have to. I found them very boring at the end...
What I really believe is missing is a sort of interactive course, like one of the many present in the american market, in the US learning style (see sportys, or kingschool). Fact is that those courses are just for FAA and anyway do not cover the ATP.
So, I just to give some good advice to some good willing companies out there : please create and sell an interactvive course with animations and explanations for the JAA-ATPL students (with some good animations for the answers to the JAA question database as well). There's still a lot to be done...
Ciao