Thresh & Kalista
I was wondering if Thresh could get a tiny tiny rework. Ever since he has been created, he has been a top pick. I don't think he is broken but I would as far to say that he is the best support.
He has a hook, disengage, a massive slow, slow, poke, shield, lifeline, tanky, gapcloser. He is just VERY good.
I think I have a good change for his E. It has a slow on it, what if it only slowed a champions that are currently dashing or using some kind of gapcloser move. To make it more rewarding to pull off such a feat with good timing. This would make it a little more fair for champions who can't jump onto people.
Champions like Udyr/Nasus/Volibear just get flayed away, and despite them being able to move very fast at times or slow the enemy, not only do they get pushed away, they get slowed. This also allows Thresh to hook someone and then push them away, simply locking them in place.
OR
Maybe make his fully stacked auto attack apply the slow instead.
Onto Kalista.
I don't really have ideas on how to completely fix this champion and I find this champion to be the most unhealthy and toxic champion in the game.
She has free moving wards. That's completely fine. No sarcasm. It is fair, they can be killed, you can avoid them. Though I have a problem with them still revealing you even after you kill them and walk over where they were looking.
The fact that she jumps after every autoattack is kind of crazy. Many champions can attack and kite, thats fine. You must stop to attack your target, somewhat slowing you down. She dashes and attacks at the same time. Making her immune to slows. I think her dashing should scale off her current movement speed. A lot of champions have slows so they have a way of getting onto her. Even chilling smite for some of those champions who don't have a slow.
Currently, you need to have direct CC to get a hold of her. And with the game being directed more to skillshots, this is indirectly buffing her.
She can throw a spear and jump with her Q. Thats fine. As I mentioned earlier with her jump distance scaling off of movement speed, maybe the jump from her Q wouldn't.
Her E is another pretty nasty part of her kit. There is no way I can detect how much it will actually hurt. She got me down to about half health so I was backing off. She activates this and takes out 90% of the other half. She then secures the kill with a spear. On top of this, it also slows you. So if it doesn't outright kill you, it lets her jump onto even more. This ability is also like a smite. She can just secure a dragon or whatever monster with it, since it will have so much stacks.
Her ultimate is the worst. You CANNOT catch out her support if she is nearby. She just makes them UNTARGETABLE and pulls them to safety. If you catch up to her, the support can shoot like a cannon even further away. I have no other words for this. Its like an "oops" button.