Bornakk just announced on the forums that Jewelcrafters are about to see a new nerf, and as a result, people are already beginning to weigh the benefits of switching to a different profession for min-maxing, or working out how they are going to re-itemize their gear.
In the next major content patch we will be removing the prismatic quality of the jewelcrafter-only Dragon's Eye gems. Like other gems, they will have to match the socket color to receive a socket bonus. When this change occurs, players with qualifying jewelcrafting skill will be provided a yet to be determined amount of Dalaran Jewelecrafter Tokens as compensation.
This probably won't be enough to entice players to drop the profession, but it is a bit of a blow. Stratfu points out that because Mage T8 is equipped primarily with yellow and blue sockets, the only way to actually meet socket bonus requirements will be to use sub-par gems.
The JC-only Runed Dragon's Eye offers +32 spell power, and currently fits into any socket, conforming to meet the necessary color requirements. This is compared to the +19 spell power that the rest of us folks get from Runed Scarlet Rubies. While Jewelcrafters will still be able to use these gems, they won't be able to stick them just anywhere.