Since the start of syllabus, MCAT has became much easier for students. Now you don't have to remember everything in your book. Instead topics of great importance mentioned in syllabus are enough for getting good marks.
Syllabus of MCAT 2015
As I told last year , the year before and even in 2012. There is very less chance of any changes in syllabus of MCAT. So Syllabus of MCAT 2015 would be quite similar to that of MCAT 2014.