Here's something interesting, Karthus's gameplay stats have RISEN after 7.9!
From what I can tell, everyone thought that Karthus would end up getting dumpstered by Adaptive helm and/or Gargoyle Stoneplate when 7.9 came out. However, judging from these graphs that I took pictures of, his overall numbers has RISEN in Winrate, and Ban rate among other numbers.
https://s25.postimg.org/sp398jhtr/championdotgeegee.png
https://s25.postimg.org/4mr0reqkf/Lolalytics.png
The sources come from Champion.GG, which while everyone had claimed had wrong information, is now a lot more correct since it was reworked into a new beta system. The other one is from Lolalytics.com, which is another Champ stat site.
I'm actually curious about how this has come to be considering I decided to take a small break from league after the patch came out until I knew how Karthus was going to fare against the new items. If anyone has any ideas as to how this happened, I'd love to hear what you think! :D