I have EPIC array data analysed, but colleagues are concerned about annotation which is massively incomplete: 56% of probes do not have UCSC 'relation to CpG island' data, and 25% no gene annotated. This seems crazy to me, but is confirmed by Illumina. They say a lot of users go and annotate from public resources.
I presume others have come across this? Any chance anyone has a full(er) annotation? Or even ideas on where to source/create?