You know what's funny? I just had a game where the opposing team's Janna was pretty much 1v5ing our team with Jhin, Xin, Zoe, Azir, and Yorick.
She started off 1v1ing our Jhin. Her Barrier + the new Move speed = AD on basics mod just allowed her to eat up a pre build jhin. Then she ran around, and did the same thing to our jungler, Azir, etc. She got to a peak of like 10/3. without even really having AP items. Then I started hitting her with Bubbles enough to allow team to kill her. But one such time she pretty much 1 hit Zoe!
No Joke. I R'd in to try to bubble her, and got a Tornado while i was mid R, and then after I got back to my R's starting point, Janna's W caught up to me, and activated her Luden's and popped Zoe like a grape. I had like 80% HP. Maybe it was a W + a Lich Bane auto. I dunno. But she did something to erase 800+hp when she wasn't even in range.
By the end of the game I had 38k Damage on Zoe with 13 kills 10 Assists. Janna had 14/11/15 with 35,446. I guess the days of no damage Janna are over. Janna beats 5 1 hitters. That's sad (to be fair I was Support Zoe, so the scaling comes slightly later. I didn't build W until late, because I needed high level Q and E, and I was outleveling our jungler by almost 3 levels). Imo, Janna only got shut down because I began R > Eing rather than setting up a E before an R combo. It's the only way I could reach and hit her and surprise her. Took half her HP in lich bane damage + E, and let team do the rest.
To put this in better perspective: Azir and Jhin only did 21k damage. Janna did 35.5k