I'd rather see Yasuo removed before I see Kalista gone. Overpowered champ by design, kit far too overloaded.
Yasuo isn't overpowered by design however. That's why in his current state he's actually really weak and not a competitive pick. It's also why release Yasuo was complete garbage to the point that Riot probobly gave him the largest single buff to an ability ever [Hey Yasuo; let's have your R fully reset your flow; thus effectively giving you a FREE LULU R worth of HP]. Which led to multiple nerfs to his maximum flow ect because that buff was what broke him. To be broken by design you have to have a kit that regardless of number nerfs is still broken; unless the numbers are nerfed to an absurdly low level [Obviously if you make a damage ability deal 0 damage the champion's not broken]. I wouldn't call Yasuo's numbers absurdly low. Especially given his free crits.
Contrast Kalista who is 90%+ pick ban in Korea even after all her nerfs and is basically immune to a massive portion of the cast because she can either infinitely kite them or dodge their skillshots effortlessly. Sure Yasuo has Windwall; but that's stationary; and has a duration far shorter than it's cooldown. Kalista's 'Screw you' function is a passive with no cooldown at all.
The fact she can say 'screw you' if you catch her support out too is just icing on the cake.
It's as I have said before back when they gave Kalista the slap-on-the-wrist 'your autoattacks have a 0.9 ratio'. In her current state you could make Kalista's basic attacks deal 0 damage and she would still be stupid. [She lasthits with Rend; and since she has infinite kiting she just needs Runnans BotRK along with Rend to still win 1v1 against most characters] When you can say 'you can make a marksman's autoattacks deal 0 damage and they'd still probobly work' you KNOW they're broken by design.
The only counter to Kalista is targeted abilities with equal or greater range than her autoattacks [Less range and you'll never get in range without Flash/really high movespeed] or jumping on her and taking her by surprise before she can kite [EG: What assassins are supposed to do so it can hardly be called a counter specifically to Kalista when it applies to every champion of the marksman archetype]
And it's not like Kalista's kit isn't overloaded. Fate's Call; Sentinel gives % damage; vision; and stops supports stealing lasthits; Rend is just outright broken as is Martial Poise [And combined they should have
never got past QC] and her Q is technically a short dash as well as long-range poke with a situational nuke enabler.
Edit:
Lulu
Whimsy (W) AP ratio reduced to 5% per 100 AP from 10% per 100 AP.
Wild Growth (R) bonus health lowered to 200/350/500 from 300/450/600
Riot seems to be gutting Lulu. And for crying out loud Riot; if you want to kill Lane Lulu and return her to being a support; which she's easily on the weaker end of as it is right now; you nerf the Ratio; not the Base. A 33% nerf to Rank 1 R might make her outright unplayable as support.
Also Nidalee's monster root is moved to her traps.
And this:
Maokai
Magic resist increased to 32.1 from 30.
MR per level increased to 1.25 from 0 Sapling Toss (E) Sapling duration increased to 40/45/50/55/60 seconds from 35 seconds.
Mr/Level for Maokai at last? He didn't have any because his passive+R basically shut out mages if he had MR/Level... so I'm looking forward to this buff... Also isn't he the first champion to not have 30 base MR if this goes through? Also Maokai suddenly changes from being of the melees the weakest to magic damage to being the champion in the game strongest against it.