Lets talk about these Janna nerfs...
http://www.surrenderat20.net/2017/09/913-pbe-update.html#more
Riot has stated that they wanted to buff Jannas offensive capability in order to nerf her defense. However I will come out and say that it was a bit much IMO
First of all YES I understand she hovers around 52-56% winrate always. But still, I find this POSSIBLY a bit much. For reference yes I am a support main, no I dont play Janna, hardly ever. I am MAYBE mastery 2. However I do play other enchanters a fair amount.
First of all im not a fan of nerfing her already incredoubly low HP. She was already one of the squishiest champions in the game. Yes she is hard to catch (well less so now, Ill get to that later) but in that case nerf how hard it is to catch her. Not the punishment of if you do. That already resulted in death.
The Attack range buff is okay, she can at least compete in Auto distance with ADCs now as well as the (questionable) passive change. However Jannas auto poke isnt good in the first place. So great... AD Janna got a buff.
They made her Q have better Mana control. So great Janna doesnt use half her mana every Q cast. And this does help her engage. So thats, will help her be more offensive now. This is probably the only compensation for every nerf on her kit.
The W changes while a flat nerf are still okay, She no longer has immense MS with the first point in it. Speaking of MS they also nerfed the movespeed of her Passive for allies, and her base movespeed. She is a immobile enchanter, whos only survivablity comes in MS. So why did you nerf EVERY source of it if you wanted to make her more offensive, as well as nerfing her base HP?
And finally her E. This is now DOUBLE the cost of EVERY other shield/heal spell on enchanter supports. With the exception of Rakans DOUBLE SHIELD. All this did was reinforce the fact that Janna NEEDS to max E, because an 18 second shield on an enchanter is brutal.
Well then if you are asking me what I think NEEDED to happen. This:
If you wanted her to be more offensive, dont nerf EVERY source of movespeed. Nerf the utility on her E sure you can nerf the CD but make it 16>8 because 18>10 is just awful.
Make her W better for offense, cause currently the passive is more useful than the slow.
And finally. NERF THE PEEL ABILITY OF HER Q AND R HER MAIN ISSUE. Nerf CD, Buff Mana on Q, this will give her more defined windows of engage/peel. While also giving her better engage.
And nerf the CD or something of R, maybe range of it. Her PEEL is her issue not her utility.
Obviously she needed a nerf. Regardless this is going to get a bunch of downvotes from those people who absolutely HATE the existence of Janna. But i digress.