Hark! It's the second phase of PlanetSide 2's Operation: Make Faster Game! SOE has published "the largest balance update to date," including "engineering improvements to physics systems and a revamped Esamir."
There's also a seasonal event designed to let sci-fi soldiers celebrate Auraximas by taking down snowmen for fun, XP, and a "Snowblower" title. Have a look at the PS2 forums for a full list of patch notes and changes.