Yeah, good point. At launch the only reasonable way to level another class was mostly with Fate groups. I suppose burning myself out on them was my own fault, but I also wanted to level another class at the time. They have also been prevalent in the relic quests so far, which probably contributes to how I feel about them. Granted, the fates for the books weren't too bad, I'm just not a fan. The entire system is decent, though. To me however, it's kind of the whole "too much of a good thing" concept. Others feel differently, which I respect.
