As with any changes that come to the World of Warcraft there is always a risk that some changes will not be intended. We normally call these bugs, but these "bugs" have been keeping people from logging in and even created an unplayable environment for some.
Blizzard is working on in game fixes and has already rolled out a patch for some fixes, but more patches and in game fixes will be on the way.
On the other hand, the random PVP system works as intended, and it may bring some life back to PVP. They simplified all the PVP rewards down to honor, which is a much better way of dealing with PVP currency. Now if we could only get simplified PVE currency everyone would be happy, at least for a little while.
Not a long review, to be sure, but really this wasn't a huge content patch.