I am pretty annoyed that they are getting rid of the item upgrades in 5.2. For the most part it won't matter, but sometimes it will and I find it annoying. The part that gets me the most is that they are not introducing additional Sha weapons so many of the heroic sha weapons will likely still be BiS for offhand weapons.
They didn't make everything in 5.1 upgradeable, so why not just make 5.2 gear non-upgradeable and leave everything else the same?