With teams around the world fighting for a spot at MSI, Riot has been working on adjusting the pro play meta prior to the start of the tournament. The next two patches will determine and shape a new meta, forcing players to re-invent themselves and fight the new optimal picks and sttegies.
That said, the Riot devs are also trying to buff some of the under-performing champions in solo queue in Patch 13.7, gnting better numbers to champions like Alistar, Kalista, and Yasuo, just to name a few. Among them is also Katarina, who is receiving tweaks with the primary goal of nerfing her Divine Sunderer.