Patch 5.0.4 might not have brought all of Mists of Pandaria's content, but it did contain all of its mechanics and class changes. Our new talent trees are active and Swirly Ball has finally returned. As with all of the pre-expansion patches, we are given a few weeks to cope with the new changes before the actual expansion goes live. While we're still missing out on our level 87 abilities and our level 90 talents, we still need to be able to deftly control our rogues for a few more weeks.
The majority of our rotations have remained intact, and you should feel right at home after a few cycles. Most of the changes that rogues are seeing are passive or quality of life improvements. Other classes are faced with relearning major facets of their playstyle, but combo points and energy continue to hold steady.