The syllabus _has_ changed.
Specifically the Nav syllabus.
If you look at the Nav Syllabus in AMC FCL 1.25 which has been in force for the past 13 years, and compare it with the EASA syllabus in the AMC to Part FCL you will see that there is very little difference! There is no CAA syllabus.
I did however say that questions are now being asked on parts of the syllabus that were not previously covered, as you have highlighted, possibly because they were not considered relevant to a PPL holder.
It is the exams that have changed, not the syllabus, and they are CAA exams not EASA exams.