I do AVCE Business. There are 7 people in the Yr 2 class, from 30 who started. Similar rates of drop out are present in the Yr 1 class.
I think that the problem with this course is that certain units are easy compared to standard A-Levels, and others are extremely hard. On balance, I would have rather done 2 A-Levels than the Double Award AVCE, as it does get quite repetitive at times, however, generally, it is more of a challenege than A-Levels (I do 2 of those too).