I have my Crystallized Horror and I'm working on the next step of Wrathion's quest chain, but I feel like I'm working to upgrade something I'm never going to get in the first place. I like to imagine that if I'm a good little Mage and keep working on my dailies, showing up to my raids, and queuing for Raid Finder, I'll eventually get what many others have gotten already via pure dumb luck.
For me, the normal and heroic modes are about the boss kills and RF is about fine-tuning my gear to get those boss kills. I feel less excited every week to set myself up for disappointment the next week. It sends shivers down my spine knowing that my elder charms of good fortune have a higher chance of giving me a redundant garbage item than giving me what I'm really working to get. And I don't feel compelled at all to play to the best of my ability in RF when somebody that just did 30k and died 30 seconds into a fight yells out on raid chat that he/she just got the one item that he/she really wanted.