Rogue rotations haven't changed significantly since Cataclysm. Each of our three specs has a new element or two added to the mix, like Blindside and the revamped Revealing Strike. The combo points and energy systems keep on ticking, enabling our familiar rotations in yet another expansion.
Rogue mechanics, on the other hand, have had several significant tweaks. While each change is significant on its own, what's really interesting is how they fit into a larger story. The "quick offhand" paradigm that has lasted for years is breaking down. Rogues are bringing significant buffs and debuffs to every environment. Combo points are more fluid than ever. Rogue rotations may not have evolved since Cataclysm, but the class as a whole certainly has.