Janna is a balanced support atm, I dont understand why she got nerf so hard.
She has a poor laning (she isnt bully), she becomes a good in late game: -Her new passive is difficult to use by allies. Her passive was good to make you adc kiting well. -Her Q has low damage and knocks up. Charging it increase the chance to not hit your enemy. -Her W deals low early damage (but scaling well with base damage), and give her lose movement. -Countered by bursty champion like morgana, annie, graves, lucian, corki because they can destroy his shield making her useless for 10s and she cannot play aggressive against them. (in-meta) -Good pick with attack speed champion like caitlyn, vayne, jinx. (They are strong champs, but out-meta) -Her R is strong, but can be stopped, can save allies but also enemies if your positioning is bad.
She has more conterplay than other supp, so it is very difficult to understand with riot has more counterplay on her.
I hope she wont become another winrate urgot's friend.