Ever since 5.1, the enlightenment quest would fail to apply the buff one completed. Today, I was happy to see that it was working again. However what i didn't notice off the bat is that it now only gives an extra 20% xp. I was little surprised that it wasn't in the patch notes.
I used RAF to level my monk to 80 with granted levels but it only ever gave me a 20% buff despite the tooltip saying 50%. I don't know if it is higher at lower levels or if it was just a typo in the tooltip but I can say for a fact that it was only 20% well over a month ago for me.