Ah, yes, I remember that, even was impossible to raise to the maximum level only doing PVE questing. For me is cool that you can raise just doing PVP, but if you cannot do the ame just doing PVE so... I remember that with my Warlock I even tried to do every quest in every race map, but was impossible. I had to PVP, even when I didn't have the mood. But the Book of Knowledge was a pretty elegant system of lore.