Janna Has More PBE Nerfs On The Way
Even though she's now at a 49% win rate in plat+ and declining rapidly. This is why you shouldn't be hasty with champion changes. People need time to adjust.
http://i.grab.la/0791d-a32edd3b-21ab-4035-910e-13ba247aeedb.png
PBE Change: Bonus AD lowered from 10/17.5/25/32.5/40 to 9/13/18/21/25